"Sun, 01 Feb 1970 03:26:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700201
Only TIME
03:26:35
General datetime
1970-02-01 03:26:35Z
For Database
1970-02-01 03:26:35
For HTTP1.1
Sun, 01 Feb 1970 03:26:35 GMT