"Mon, 12 Jan 1970 04:35:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
04:35:54
General datetime
1970-01-12 04:35:54Z
For Database
1970-01-12 04:35:54
For HTTP1.1
Mon, 12 Jan 1970 04:35:54 GMT