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PrismKit

Calendar Converter

Local

Convert a date between the Gregorian, Islamic, Hebrew, Persian, Chinese and other calendars, Julian Day, Unix time and Excel serial numbers.

iCal Merger

Merge several .ics calendar files into one calendar, removing duplicate events and time zones.

Alarm Clock

Set browser alarms for a date and time, chosen weekdays or a cron schedule in any time zone, with sound and notifications while the page is open.