ESBDateCalc Pro is our Date and Time Calculator for
Windows and it aims to provide a sophisticated yet
easy to use tool to perform Date and Time
Calculations. This includes displaying various
information for a given year and a given date, as well
as doing calculations on a Date Range as well as a
Date / Time Range. Also includes Time Zone
Conversions, National Holidays, Christian Holidays,
Jewish Holidays, Duration Summation and more.

Choose a Year and see what day of the week Christmas
is on; when is Hanukkah; when is Jewish Passover; when
is Easter; what day of the week is Halloween on; when
is Thanksgiving in US or Canada; when is ANZAC Day
celebrated; even what it would look like in Roman
Numerals.

Choose a Date and see it as an Astronomical Julian Day
or a Modified Julian Day; the Day of the Year or how
many Days left in the Year; what it would look like as
an ISO-8601 formatted Week String or even how the Date

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