"Sun, 01 Feb 1970 01:25:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700201
Only TIME
01:25:21
General datetime
1970-02-01 01:25:21Z
For Database
1970-02-01 01:25:21
For HTTP1.1
Sun, 01 Feb 1970 01:25:21 GMT