"Mon, 26 Jan 1970 14:44:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700126
Only TIME
14:44:39
General datetime
1970-01-26 14:44:39Z
For Database
1970-01-26 14:44:39
For HTTP1.1
Mon, 26 Jan 1970 14:44:39 GMT