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 10 Good Friday
April 12 Easter
April 13 Easter Monday
May 01 International Workers' day
May 21 Feast of the Ascension
May 31 Pentecost
June 06 National Day
June 26 Midsummer Eve
June 27 Midsummer Day
November 07 All Saint's Day
December 24 Christmas Eve
December 25 Christmas
December 26 Boxing Day
December 31 New Year's Eve