dsdsds said: ↑ It's probably neither (and both). But what is the standard, if any, if one is writing a contract? If I want something to expire on midnight between March 11 and March 12, how is it defined? 0h00 2009-03-12 ? 24h00 2009-03-11 ? This contract will expire midnight of the 11th March 2018 Midnight is spelt out Please Register or Log in to view the hidden image!