• Under days and months, entering  > finds the last day of the month or year.
• Dates are recalculated after any change.  Use the save  button to store up to three dates, retrieved by restore.

For a brief sketch of the calendars, see:

European Christian and Indonesian Muslim calendars

For fuller background, explanations and acknowledgements, see:

Ian Proudfoot, Old Muslim Calendars of Southeast Asia, Leiden: Brill, 2006.