"Mon, 12 Jan 1970 23:37:53"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
23:37:53
General datetime
1970-01-12 23:37:53Z
For Database
1970-01-12 23:37:53
For HTTP1.1
Mon, 12 Jan 1970 23:37:53 GMT