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 11 Good Friday
April 13 Easter
April 14 Easter Monday
May 01 International Workers' day
May 22 Feast of the Ascension
June 01 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