"Thu, 01 Jan 1970 12:52:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
12:52:42
General datetime
1970-01-01 12:52:42Z
For Database
1970-01-01 12:52:42
For HTTP1.1
Thu, 01 Jan 1970 12:52:42 GMT