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
March 20 Good Friday
March 22 Easter
March 23 Easter Monday
April 30 Feast of the Ascension
May 01 International Workers' day
May 04 Pentecost
June 06 National Day
June 20 Midsummer Eve
June 21 Midsummer Day
November 01 All Saint's Day
December 24 Christmas Eve
December 25 Christmas
December 26 Boxing Day
December 31 New Year's Eve