"Mon, 26 Jan 1970 14:12:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700126
Only TIME
14:12:21
General datetime
1970-01-26 14:12:21Z
For Database
1970-01-26 14:12:21
For HTTP1.1
Mon, 26 Jan 1970 14:12:21 GMT