- #Calendarcontrol full
- #Calendarcontrol iso
Note that I'm using Date.toLocaleDateString above, but the result is the same as if you'd used. One way to evade this problem is to use UTC when formatting too: Depending on your system time zone, new Date('') can be February 3 or February 2 in your system time zone.
#Calendarcontrol iso
When you initialize a Date instance using an ISO 8601 string, the actual value stored in the Date instance is the number of milliseconds since JanuUTC. The most common reason for off-by-one-day errors is (as noted in his comments above) a mismatch between the time zone used when declaring the Date value and the time zone used when formatting it in your desired calendar. Time zone mismatch between date initialization and date formatting
Bugs in the ICU library used for JS's calendar calculationsġ. 
Using the wrong variation of the Islamic calendar (JS implementations typically offer 5 different Islamic calendars!). Time zone mismatch between date initialization and date formatting. There are three possible reasons for the "off by one" date problems you're seeing: I have tested this in node and chrome and it gives the same resulting discrepancy. Is there a more robust method to get the Islamic Date in Javascript other than using the 'ar-SA' locale (but not using external libraries)? Is this an error/bug or is it the correct internal workings of javascript? This is strange because the ar-SA locale uses the Islamic (Hijri) calendar by default. arabic-Saudi Arabia), it will give the correct result. However, if the option passed to the Intl.DateTimeFormat() is ar-SA (i.e. the 1st of the following month) and it calculated the month Rajab to be 29 days rather than 30 days. This result is one day after the month of Rajab (i.e. When using the javascript Intl.DateTimeFormat() to display the Islamic (Hijri) date for the 3 March 2022 using the islamic calendar option, it will give the Islamic Hijri Date of ( 1 Shaʻban 1443 AH). The month of Rajab for the year 1443 AH is 30 days in accordance with the Islamic (Hijri) Calendar in accordance with all websites, applications, MS Office, and Windows calendars. The 3rd March 2022 is the end of this Hijri Month (month of Rajab for this year 1443 AH) i.e. -įunction dateToCalendars(Y, M, D, op=)) All other options as in Intl.DateTimeFormat() 'locale' the locale to use (default 'en') options as in Intl.DateTimeFormat() with additional 'from' and 'locale' Import * as TemporalModule from Y,M,D are the date to convert from #Calendarcontrol full
= load Temporray polyfill (not needed after full Temporal implementation) =
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