"Thu, 12 Feb 1970 11:04:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
11:04:52
General datetime
1970-02-12 11:04:52Z
For Database
1970-02-12 11:04:52
For HTTP1.1
Thu, 12 Feb 1970 11:04:52 GMT