parse_time(+Text, 
?Format, -Stamp)
| Name | Example | 
| rfc_1123 | Fri, 08 Dec 2006 15:29:44 
GMT  | 
Fri, 08 Dec 2006 15:29:44 +0000  | |
| iso_8601 | 2006-12-08T17:29:44+02:00  | 
20061208T172944+0200  | |
2006-12-08T15:29Z  | |
2006-12-08  | |
20061208  | |
2006-12  | |
2006-W49-5  | |
2006-342  |