DateTimeExtensions
Just a sample site of a possible usage of DateTimeExtensions nuget package.
New Zealand (en-NZ) change
Holidays
January 01 New Year
January 02 Day after New Year's Day
February 06 Waitangi Day
April 03 Good Friday
April 05 Easter
April 06 Easter Monday
April 25 Anzac Day
June 01 Queen's Birthday
October 26 Labour Day
December 25 Christmas
December 26 Boxing Day
December 28 Boxing Day Observed