The Islamic Calendar has had support in Java since 8 introduced the Date and Time API. I don't know if OS support was around, Wikipedia is sparse on the topic.

The Islamic Calendar has had support in Java since 8 introduced the Date and Time API. I don't know if OS support was around, Wikipedia is sparse on the topic. [#] - https://en.wikipedia.org/wiki/Islamic_calendar#Computer_support https://en.wikipedia.org/wiki/Islamic_calendar#Computer_supp...