"Sun, 01 Feb 1970 15:05:58"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700201
Only TIME
15:05:58
General datetime
1970-02-01 15:05:58Z
For Database
1970-02-01 15:05:58
For HTTP1.1
Sun, 01 Feb 1970 15:05:58 GMT