what do you call a date/time with a T in the middle (2008-09-18T00:00:00)?

If you have a date like '2008-09-18T00:00:00' does it have a name? UTC? Something like that? Surprisingly hard to google for this...开发者_运维技巧

That is a combined date/time representation as defined by ISO8601. It often has a timezone/offset appended to it, e.g. 2008-09-18T00:00:00Z would denote UTC time.

That looks like RFC 3339.

ISO 8601 is also relevant: Link

Also might be ISO-8601.

Technically, that is ISO 8601, but Google refer to this simply as the "ISO date format" on this support page, as do a lot of other people (including me) seeing as it's a very popular standard. It's the top result if you google "iso date format".