"Wed, 07 Jan 1970 02:46:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
02:46:23
General datetime
1970-01-07 02:46:23Z
For Database
1970-01-07 02:46:23
For HTTP1.1
Wed, 07 Jan 1970 02:46:23 GMT