"Mon, 12 Jan 1970 12:34:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
12:34:57
General datetime
1970-01-12 12:34:57Z
For Database
1970-01-12 12:34:57
For HTTP1.1
Mon, 12 Jan 1970 12:34:57 GMT