"Mon, 12 Jan 1970 14:12:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
14:12:04
General datetime
1970-01-12 14:12:04Z
For Database
1970-01-12 14:12:04
For HTTP1.1
Mon, 12 Jan 1970 14:12:04 GMT