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 17 Good Friday
April 19 Easter
April 20 Easter Monday
May 01 International Workers' day
May 28 Feast of the Ascension
June 06 National Day
June 07 Pentecost
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