"Wed, 07 Jan 1970 04:39:25"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
04:39:25
General datetime
1970-01-07 04:39:25Z
For Database
1970-01-07 04:39:25
For HTTP1.1
Wed, 07 Jan 1970 04:39:25 GMT