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 29 Good Friday
March 31 Easter
April 01 Easter Monday
May 01 International Workers' day
May 09 Feast of the Ascension
May 19 Pentecost
June 06 National Day
June 21 Midsummer Eve
June 22 Midsummer Day
November 02 All Saint's Day
December 24 Christmas Eve
December 25 Christmas
December 26 Boxing Day
December 31 New Year's Eve