Full year and monthly calendars for 25 different calendar systems. Alternative planning calendars. A month-by-month, side-by-side comparison of any two of the calendar systems. The display remains synchronised as you change day, month and year values in either calendar system being viewed. Date conversions among the supported calendar systems. British regnal date conversion. Lists of Western Christian, Eastern Orthodox, Buddhist, Chinese, Hebrew, Hindu, Islamic, Baha’i and Sikh festivals. “Observed Days” for any year from 1990 for around 230 countries worldwide.
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