"Wed, 28 Jan 1970 12:52:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700128
Only TIME
12:52:40
General datetime
1970-01-28 12:52:40Z
For Database
1970-01-28 12:52:40
For HTTP1.1
Wed, 28 Jan 1970 12:52:40 GMT