"Mon, 12 Jan 1970 02:27:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
02:27:19
General datetime
1970-01-12 02:27:19Z
For Database
1970-01-12 02:27:19
For HTTP1.1
Mon, 12 Jan 1970 02:27:19 GMT