Online date converter ethiopian to gregorian. net5. Online date converter ethiopian to gregorian

 
 net5Online date converter ethiopian to gregorian  Supports conversion from Ethiopian Calendar to Gregorian Calendar

Install the latest version of Ethiopian Calendar & Converter APP for free. flag Flag as inappropriate. This project contains javascript code (node), and a progressive web application (PWA) for conversion of the date formats back and forth. February 10 2021 (Wednesday) 4 Yekatit 2013. Ethiopian date to Gregorian date. - Date Converter: Julian to GregorianConvert a date. S. Net Core/ . What's new. - Fast Date Converter from Gregorian to Ethiopian Calendar. With just a few clicks, with Hijri Date Converter, you can convert dates from Hijri to Gregorian and Gregorian to Hijri and sync the Hijri dates with the regular calendar. The Ethiopian calendar is based on the ancient Coptic. Net Core/ . You can add Birthdays of your friends and families to get notified in advance. This enables you. The app supports displaying dates in Ethiopian chronology, Gregorian chronology, and Ethiopian chronology with Geez dates with an option to display one or two calendars at a time. date ethiopia gregorian date-converter Updated. 6 Fre: 27 Tahsas 2004. Code Issues Pull requests Go-Lang Package for Ethiopian Calendar. The Calendar in. Download Ethiopian Calendar & Converter APK for Android. Date Converter convert the date from Hijri to Gregorian hijri to gregorian converterIts calendar, called the Ge’ez, places that date close to eight years after the Gregorian calendar, which is the most widely used calendar in the world. This will allow you to convert Gregorian Calender to Ethiopian Calender and vice versa. To convert to the Gregorian calendar, add 92 to the Ethiopian cmc. Leap years however do not occur when the year is a multiple of 4, as with the Gregorian system, but will occur on the year prior. This webpage provides an easy-to-use interface that allows users to input a date in either the Persian or Gregorian calendar and convert it to the corresponding date in the other calendar. This is an Ethiopian Calendar & date converter available in Amharic, Oromiffa, Tigrinya and English. Our holidays include national holidays, Christian Orthodox/Islamic holidays and fasting days. ) or on the 12th in (Gregorian) Leap Years. 0-windows net5. Optimized code performance compared to similar packages. I tried that:. The app supports displaying dates in Ethiopian chronology, Gregorian chronology, and Ethiopian chronology with Geez dates with an option to display one or two calendars at a time. Today, my age is 20 years, 10 months and 18 days. Ethiopian Date Converter To Western. Calendar type: Gregorian calendar; Tools. Ethiopian calendar is unique for having 13 months, 12 months each with 30 days and 1 more month with 5 or 6 days. Users can enter the date in various formats, including the day, month, and year. Exsense PersianDate is a simple program for convert persian to/from Gregorian Date. The four year cycle is also enumerated with the names of the four Evangelists: Mateos, Markos, Luqas and Yohannes as they are known in Ethiopian Orthodox Church. This is a vary simple API developed for developers to intergate with your application as you see it fit. For example, November 26, 2360 BCE would be entered as November 26, -2360. Gregorian Date: Hijri Date: Ethiopian Good Friday: Friday: 14 April (Naysan) 2023: 23 Ramadan 1444: Ethiopian Easter Sunday: Sunday: 16 April (Naysan) 2023: 25 Ramadan 1444: Eid ul Fitr:7:00 pm in GMT is 10:00 pm in Addis Ababa, Ethiopia. ⊛ Works for past and upcoming years. How this works. > Age Calculator with additional information (including daily horoscope) > Next Birth Day left Months and Days. ⊛ Supports conversion from Ethiopian Calendar to Gregorian Calendar. hijri to gregorian date converter islamicfinder Sep 22 2022 web feb 18 2023 € with just a few clicks with hijri date converter you can convert dates from. The Ethiopian new year usually falls on September 11th or 12th. This calendar, the Ethiopian calendar is often called the Julian Calendar, but this is incorrect. Intuitive, clean, and easy-to-use interface. Ethiopian-Gregorian Calendar Converter Enter Ethiopian Date (dd/mm/yyyy): Convert to Gregorian. Ethiopian Calendar & Converter is FREE to download. Ethiopian Calendar with a date Converter to convert days from Ethiopian to Gregorian Calendar and vice versa. • It lets you select Geez numbers or Arabic numbers to view the date, month and year. Local holidays are not listed. Q. Unlike the Lunar Hejira , where the new day begins right after sunset (at moonrise), and unlike the Gregorian calendar, in which the new day starts at midnight (00:00 or 24:00), the day in the. 6, last published: 6 years ago. > Who born on your birthday. If you were able to find this, it would be possible to build this logic into Alteryx. This 8-year gap between the Ethiopian and the Gregorian calendars results from alternate calculations in determining the date of the Annunciation. • The Muslim calendar. Calendar. Ethiopian Calander with Orthodox holidays & fasting days. Although China uses the Gregorian calendar for everyday dates, they use the traditional Chinese Calendar for holidays. Ethiopian Calendar. Subtract 120 days. About this app. This 8-year gap between the Ethiopian and the Gregorian calendars results from alternate calculations in determining the date of the Annunciation. • Hebrew calendar. Offset UTC +3:00 hours. The Ethiopian Calendar is based on the ancient Coptic calendar and still in use today in Ethiopia. 🎯 Take Notes. Most of the methods and formats are similar to those of. . November 12 2011 (Saturday) 3 Hidar 2004. Date Converter and National holidays are included. To convert to the Gregorian calendar, add 92 to the Ethiopian cmc. 01. 5 Tor: 26 Tahsas 2004. Project description Introduction. Amharic ASCII Art. Est. Gregorian date to Ethiopian date Date Sat 1 Sun 2 Mon 3 Tue 4 Wed 5 Thu 6 Fri 7 Sat 8 Sun 9 Mon 10 Tue 11 Wed 12 Thu 13 Fri 14 Sat 15 Sun 16 Mon 17 Tue 18 Wed 19 Thu. 1 Tirr 2011. Time of Update: 2017-02-28. ⊛ It is simple to use and navigate. Disable moonphases. "Meskel" is from the ancient Ethiopian language Geez for "cross". The ancient Egyptian calendar is a 365 days solar calendar. It can be. The current problems for me are: First, I want to know the code how to convert Gregorian calendar to Ethiopian data not the current R code which the author converted Ethiopian calendar to Gregorian For example: my variable (date_Gregorian) is "12/07/2016 ", "11/05/2015". ⊛ It can help you save events, reminders and tasks; and you will get notified on the specified time. d. 🎯 Show yearly Ethiopian holidays with a. ⊛ Date Converter to convert days from Ethiopian to Gregorian Calendar. Gregorian Calendar. EtCal has Time Converter that converts the time from Ethiopian local time to. where toH true to hijri and false to gregorian, and datein a valid date string, i have attempted to compensate for if it is one day out, which seems to bring it in line with your top conversions. gz . It can be used to convert dates from Ethiopian Calender to Gregorian Calender and from Gregorian calender to Ethiopian calender. The basic gist is calculating the difference in days from a reference Ethiopian date, but this is different for leap years and non-leap years. com. It has. August 8 2018 (Wednesday) 3 Nehasie 2010. The Gregorian calendar reform contained two parts: a reform of the Julian calendar as used prior to Pope Gregory’s time and a reform of the lunar cycle used by the Church, with the Julian calendar, to calculate the date of Easter. A year in the Ethiopian calendar is 13 months long, with 12 months of 30 days each. This is a vary simple API developed for developers to intergate with your application as you see it fit. Addis Ababa time. Below is the Ethiopian calendar. See on GitHub Greigorian Date Change the date above to convert to Ethiopian Date Ethiopian Date /. Date converter. 0. ⊛ Its size is small- but it is fully fledged. 0. Date in. 5 01 35. Some holidays and dates are color-coded: Red –Public Holidays. 3rd Quarter. (Elsewhere in the Principia Discordia, it is mentioned that the Curse of Greyface occurred in 1166 BC. Key differences between. > convert date-time values between Ethiopian and European/Gregorian calendar. It has its roots in the ancient Egyptian calendar, whose earliest documented implementations date back to the 5th millennium. Meskel occurs on 17 Meskerem in the Ethiopian calendar (27 September, Gregorian calendar, or 28 September in leap years). Gregorian Calendar. Welcome to Ethiopian Calendar Pages. Ethiopia Time Zone Converter. If you need to convert dates from the Ethiopian calendar to the Gregorian calendar, there are several online tools that can help you do so. These calendars are designed to show. The Ethiopian calendar years 1992 and 1996, however, began on the Gregorian dates of 12 September in 1999 and 2003 respectively. The Ethiopian calendar is also known as the Amharic calendar and is based on the ancient Coptic calendar. This is an Ethiopian Calendar & date converter available in Amharic, Oromiffa, Tigrinya and English. 5 01 35. A sixth epagomenal day is added every four. Create a new date on January 1, 8 years ahead of the Ethiopian year. The Discordian or Erisian calendar is an alternative calendar used by some adherents of Discordianism. Ethiopian Calendar (Habesha Calendar) app is the best app with many amazing features like:- Date Converter, Remainder & Alarm, Todo-List, Ethiopian calendar widget with a small app size and with the best ui design. 69 MB and the latest version available is 2. To find the corresponding year of the Gregorian calendar, add 621 or 622 (depending on the time of the year) to a Solar Hijri year. Disable moonphases. The Gregorian calendar is the calendar that is used. Open the official website and download the software. The AndegnaDateTime class is just a wrapper around PHP’s built-in DateTime object and implements the PHP DateTimeInterface (OK! I lied on one part but trust me you don’t wanna know that ). 0 was computed. 1 Yekatit 2008. [1] This calendar is based on the ancient Egyptian calendar. Supports. Disable moonphases. They usually indicate it with an abbreviation on the diplomas or transcripts: E. Sample usage: DateTime originalTime; //Populate variable and then: java. Publisher: Exsense Software, License: Freeware, Price: USD $0. Date::Converter and Date::Converter::* modules are free software. When comparing historical dates, it's. Conversion from the current "fixed" Hebrew calendar to its corresponding Gregorian date is complex; for the unfixed calendar before 359 C. Then calculate date difference between starting point and required date and apply 30 day per month + 5 days 13th month rules and leap years. Ethiopian Calendar Converter Ethiopian Date to Gregorian Date 🔊 Gregorian Date to Ethiopian Date 🔊 The calculator converts an input Gregorian date to an Ethiopic calendar date Articles that describe this calculator. About this app. Ethiopian Calendar. You can add Birthdays of your friends and families to get notified in advance. It can be installed as a PWA. Amharic Text-to-Speech. Ahargana day count to the Gregorian date. 20 Zul Qi'dah 1445. Ethiopian Baby Name Generator. Jan 25, 2021. Source: WikiPedia. Thanks a lot, I found those resources too. Connect with us and get all about fascinating Ethiopia and more. 0. published 0. You can add Birthdays of your friends and families to get notified in advance. Customize this calendar–large. I hope this is helpful. Next, you will need to select the date and then click on the convert button. It's actually surprisingly simple: new DateTime (5780, 5, 7, new HebrewCalendar ()) This will return a DateTime object with Gregorian property values (2020-02-02), as the properties of a DateTime are rendered with the Gregorian calendar. It occurs on September 11 in the Gregorian calendar, except for leap years when it occurs on September 12. Screenshots. The historical version. Assuming that the date is in cell A1, here is the Excel formula to convert Gregorian dates to JDE Julian: = (YEAR (A1)-1900)*1000+A1-DATE (YEAR (A1),1,1)+1. 6MB. - Date Converter: Julian to Gregorian Easy tool to convert any dates between Ethiopian and Gregorian calendars. 3rd Quarter. Easy tool to convert any dates between Ethiopian and Gregorian calendars. Description. The calendar displays Christian, Muslim and Ethiopian National Holidays. formerly hijri-converter. Resources Release history Release notifications | RSS feed . You can change the date by using the +1 and -1 buttons or enter in a new date and use the convert button again. py","contentType":"file"},{"name. 0. Local holidays are not listed. February 10 2017 (Friday) 4 Yekatit 2009. In Ethiopian calender[], a year contains 13 months, the first 12 months have 30 days,the last month has 5 or 6 days depends on the leap year. Ethiopian Calendar & Converter APP. Huge thanks to Ethio-European Date Converter. Monday. This is the Gregorian calendar from January to December for year 2016 AD, (1437-1438 AH) with corresponding Hijri (Islamic) dates in Ethiopia in addition to dates of national holidays in Ethiopia for this Gregorian year. 2. We make sure to remind you on Ethiopian Holidays. 1. April 2023 1444 in Ethiopia, Gregorian Islamic Calendar. kerbrose. It features an interactive Ethiopia calendar widget and information about important Ethiopian dates, public holidays, Orthodox Tewahedo fasting dates. A tag already exists with the provided branch name. Ethiopia uses its own calendar that's seven to eight years behind the Gregorian calendar used in Western countries. If you want to get the Hebrew calendar values back out of the DateTime, you must explicitly. February 8 2017 (Wednesday) 2 Yekatit 2009. Gray –Typical Non-working Days. Like in the Julian calendar, a leap year in the Ethiopian calendar happens every 4 years without exception. Also, displays dates of national holidays in Ethiopia. – Shows only 1 month at a time. 81 (81) Update. How to covert Ethiopian Calendar into Gregorian Calendar onlineConnecting Read reviews, compare customer ratings, see screenshots, and learn more about Ethiopian Calendar & Converter. It can also be used to convert dates from/to Gregorian calendar & view Ethiopian Orthodox holidays, Ethiopian Orthodox day names. You can register. So Andegna\DateTime keep hold of the gregorian date and overrides the format, getTimestamp, add, ‘diff’ and such methods to give you an Ethiopian Calendar equivalent. An ad-free version of this app with more features and languages is available pre-installed on all tecno, infinix and itel phones. gregorian calendar-converter ethiopian-date ethiopian-calender Updated Mar 8, 2023; Java; AlexisAmand / Imerologio Star 1. " The Ethiopian date is converted to the Gregorian calendar and displayed in the boxes below the "Convert" button. 0, was released on 2023-03-03 (updated on 2020-10-28). You can change the date by using the +1 and -1 buttons or enter in a new date and use the convert button again. iPad. to_hijri() Hijri(1403, 2, 17) You can also construct a Gregorian object from a datetime. To change to and from Gregorian to Ethiopic date versions; ken. • ISO calendar. Ethiopia uses its own calendar that's seven to eight years behind the Gregorian calendar used in Western countries. Also known as the Hijri Calendar 1445, it started after the Hijrah of the Prophet (PBUH) to Madina. basic usage is to pass in integers . Then calculate date difference between starting. EtCal has Time Converter that converts the time from Ethiopian local time to your timezone and vise versa. Ethiopia, Orthodox Tewahedo. EthiopianCalendar. Find out Ethiopian public holidays and the current date with the Ethiopian Calendar. No of public holidays: Discover some of the interesting Ethiopian date and time facts that make the Ethiopia's calendar so unique. In addition, it can be used to manage appointments. Start using ethiopian-date in your project by running `npm i ethiopian-date`. Getting started is easy! Welcome to Geez Ethoipian date and time converter API. Web european date sat, 30 sep 2023 (at gmt+0) ⓘ change the date above to convert to ethiopian calendar. - Teaches how to calculate Ethiopian Calendar through a series of tutorials - Provides a detailed information about the calendar and the current period of time - Supports both Amharic and English languages - Supports both Arabic and Ge'ez numerals - Ability to add a widget showing Ethiopian Time. 1 Yekatit 2009. Addis Ababa time. It is a solar calendar based on a 365-day common year divided into 12 months of irregular lengths. Gregorian date to Indian National Calendar date. It is a port from Java’s Ealet 2. Zemen Ethiopian Date Converter application is an application for. For a complete calendar please check our Ethiopian calendar page . Locally, almost all Ethiopians use a 12-hour. Zemen Ethiopian Date Converter application is an application for. This Application has also date converter which. Converts Ethiopian calendar dates into Gregorian and vice versa. ) This converter works for the range of March 1900 to February 2100 GC. Subtract 120 days. February 8 2021 (Monday) 2 Yekatit 2013. Calendar = c. February 9 2016 (Tuesday) 2 Yekatit 2008. Conversion ↑. 3. 0+ . PHP intl can convert a Gregorian date to other calendar type. Click the Convert Button to view the corresponding Maya Long Count date, both visually and numerically. Use the Gregorian calendar, the Ethiopian calendar is based on the Egyptian and has 13 months---12 with 30 days and the last month with six days on a leap year and five days on all other years. When you select a date, you will see the converted date. Free Ethiopian Calender to download. write in gregorianDate textbox. Since Julian Day Number (the number of days since 1 January 4713 BC - Julian Calendar) is used as a common reference point, it is easy to convert dates between the different calendars. 0. 5 KB. 3 alternative Widgets. And by the way it also support Amharic date formatting and much much more. 🎯 Calculate Age. 50+ Thousand Downloads PREMIUM. • It lets you convert from Gregorian calendar to Ethiopian Calendar and vice versa. Category. Number to Convert : 🔊. A fresh new Ethiopian Calendar with more features included. Ethiopian Calendar is a free application to manage schedules, create calendar events, set reminders, convert dates, and much more. Latest version: 0. Which calendar is used on documents, depends on the educational institution. It is also 7/8 years behind the European/Gregorian calendar. The program allows you to customize the output style, as well as the Date and Time style. . ethiopian-calender-api. iPad. The interactive Ethiopian calendar below provides the monthly calendar, both in Ethiopian and European dates count, and also shows. This is an Ethiopian Calendar & date converter available in Amharic, Oromiffa, Tigrinya and English. arrow_forward. 01. ethiopian_date is a date converter from Ethiopian calendar to Gregorian calendar and vice-versa. 4 Ons: 25 Tahsas 2004. Gregorian date to Hindu mean lunisolar calendar. . The year 2015 is a common year, with 365 days in total. The Ethiopian Calendar (Amharic: የኢትዮጵያ ዘመን አቆጣጠር) is the principal calendar used by Ethiopian Amharic Language users and also serves as the liturgical calendar for Ethiopia and Eritrea. The Ethiopian calendar is composed of 13 months, 12 months of 30 days and 1 month of 5 or 6 days depending if it's a leap year. It was used for fiscal purposes in Egypt until the adoption of the Gregorian calendar on 11 September (6 Nesi) 1875. For example, at a very rough calculation, the Ethiopian calendar is 92 months behind the Gregorian. py","path":"ethiopian_date/__init__. Works for any year - including past and future. toEC Date conversion from Gregorian to Ethiopian; toGC Date conversion from Ethiopian to Gregorian; leapYear Determine whether or not this date is in a leap year; formatYear Retrieve the formatted year for this date; weekOfYear Retrieve the number of the week within the year in which this date is located; daysInYear Retrieve. This function takes an Ethiopian date and converts it to a Gregorian date. 0 . The Ethiopian Calendar Year 1998 Amätä Məhrät ("Year of Mercy") began on Gregorian calendar 11 September 2005. So your rules are: if XXXX is an ethiopian leap year (2007) ethiopian: 04/23/XXXX gregorian: 01/01/XXXX + 8 if XXXX is not an ethiopian leap year (2008) ethiopian: 04/22/XXXXJava-based calendar converter to convert Ethiopian to Gregorian and Gregorian to Ethiopian date. Ethiopian Calendar. ⊛ It can help you save events, reminders and tasks; and you will get notified on the. format (a) Share. net is an interactive Ethiopian Calendar converter and blog. Convert ethiopian calendar to gregorian calendar (ec to gc) or vice versa with. The calendar begins on Gregorian date September 22nd, 1792, the September equinox and date of the founding of the First Republic. Mayan Long Count: . ⊛ It supports conversion from Ethiopian Calendar to Gregorian Calendar ⊛ It supports conversion from Gregorian Calendar to Ethiopian Calendar ⊛ It has full list of national and religious holidays of Ethiopia ⊛ It asks no permission and has no adds ⊛ Its size is small- but it is fully fledged One may observe the real start date in future centuries in a Gregorian to Ethiopian Date Converter. Ethiopian Calendar is an online Ge'ez calendar converter and blog. The Ethiopian Calendar is 7 to 8 years behind the Gregorian Calendar, has 13 months instead of 12. The Iranian calendar (also known as Persian calendar or the Jalaali Calendar) is a solar calendar currently used in Iran and Afghanistan. Ethiopia is in the Eastern Africa Time zone all year and does not have daylight savings. How to covert Ethiopian Calendar into Gregorian Calendar online Calculators used by this calculator. // create some Ethiopian date how ever you want $ ethiopian_date = Andegna DateTimeFactory:: now (); // you get a PHP DateTime object to play with $ gregorian = $ now-> toGregorian (); Warning: the returned DateTime object is just a clone. February 8 2023 (Wednesday) 2 Yekatit 2015. Disable moonphases. 000+03:00These calculators convert dates between Gregorian and Coptic calendar systems. Follow. Pick a Gregorian, Persian or Hijri date and see its equaling date in other tow. Number of days: 365 / Leap:366. This holiday is based on the Ethiopian calendar, which was fixed to the Julian calendar in 25 BC by. January 11 2019 (Friday) 4 Tirr 2011. This is an Ethiopian Calendar & date converter available in Amharic, Oromiffa, Tigrinya and EnglishThe Gregorian calendar conversion • Julian and Gregorian calendars • Julian days calculation • Old Russian (Byzantine) system of chronology • Mayan calendar, 2012, the end of the world. ' The Ethiopian date is converted to the Gregorian. ⊛ It has built in alarm and notification systemDate Conversion. iPhone. Gregorian date to Indian National Calendar date. Data safety. Share This: Twitter Facebook Comments. 13 Months in a Year. That’s how it basically works. After some research, there is a leap day in the Hijri calendar which will increase. If you are in GMT, the most convenient time to accommodate all parties is between 9:00 am and 3:00 pm for a conference call or meeting. Latest Version. The Gregorian calendar conversion. About this app. September 6 2024 (Friday) 2 Quaggimi 2016. Once the moon is sighted, the new month commences. Full Moon. EtCal has Time Converter that converts the time from Ethiopian local time to your timezone and vise versa. Disable moonphases. Our holidays include national holidays, Christian Orthodox/Islamic holidays and…Download Ethiopian Calendar & Converter APK for Android. - GitHub - andegna/calender: If you ever want to convert Ethiopian Calender to any other calender system (like the Gregorian. is converted to. Start using ethiopian-date in your project by running `npm i ethiopian-date`. Say the value in A1 displays as:. I would like convert this date:09/13/1436 (it is Hijiri) to 2015-06-30(it is Gregorian). Ethiopian Calendar. 0. Simple Ethiopian Calendar for Android with Ethiopian-Gregorian date converter. Below is the Coptic calendar. Gregorian Islamic Calendar. Installation. Gray –Typical Non-working Days. August 7 2018 (Tuesday) 2 Nehasie 2010. February 10 2013 (Sunday) 4 Yekatit 2005. A class library for converting Ethiopian dates to Gregorian and vice versa. About this app. February 10 2023 (Friday) 4 Yekatit 2015. Updated on. • Days between dates. Ethiopian Calendar. Days of the remembrance of the departed. Easily convert one calendar to another using this calendar converter. Designed for Android version 5. 1 Mäskäräm, for years between 1900 and 2099 (inclusive), is usually 11 September (Gregorian). Install the latest version of Ethiopian Calendar & Converter APP for free. , I want to covert it to. let me know if it works for you. Ethiopian Calendar. Full Year Hijri Islamic Calendar. Ethiopia started the. Conv…The calculator converts Julian calendar date to Gregorian calendar date taking in account the calendar era. Our holidays include national holidays, Christian Orthodox/Islamic holidays and fasting days. Download the tool at Nuget. Ethiopian Date converter that works for the browser and node. 0 net6. The calendar eras. February 9 2023 (Thursday) 3 Yekatit 2015. You can find the conversion results at the bottom of the page. js. Free online Amharic keyboard compatible with all Mobile and Desktop devices. Gregorian Calendar. E. C# class library for generating Ethiopian Calendar and also converting Gregorian Calendar dates into Ethiopian dates and vice versa. Download Ethiopian Calendar & Converter APK for Android. Calendar App Features are : 🎯 Convert Dates between Ethiopian and Gregorian. Ethiopian Calendar, Holidays, Date Converter ‎Ethiopian Calander with Orthodox holidays & fasting days. ☆ In Ethiopian Calendar You can easily go between months with Ethiopian previous and next month buttons. Usage(How Does Ethiopian Calendar Differ from Gregorian Calendar in Chinese (Simplified)?) 埃塞俄比亚日历与公历有很大不同,公历是世界上使用最广泛的日历。 埃塞俄比亚日历基于古老的科普特日历,据信该日历自公元 4 世纪以来一直在使用。Free Ethiopian Calendar for Android. It is a bilingual English/German program. Introduction. A date converter from Ethiopian calendar to Gregorian calendar and vice-versa.