DateTimeExtensions
Just a sample site of a possible usage of DateTimeExtensions nuget package.
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Holidays
January 01 New Year
January 06 Epiphany
April 01 Good Friday
April 03 Easter
April 04 Easter Monday
May 01 International Workers' day
May 12 Feast of the Ascension
May 22 Pentecost
June 06 National Day
June 24 Midsummer Eve
June 25 Midsummer Day
November 05 All Saint's Day
December 24 Christmas Eve
December 25 Christmas
December 26 Boxing Day
December 31 New Year's Eve