"Thu, 15 Jan 1970 20:41:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
20:41:37
General datetime
1970-01-15 20:41:37Z
For Database
1970-01-15 20:41:37
For HTTP1.1
Thu, 15 Jan 1970 20:41:37 GMT