Don't make the input & output the same or else you'll likely get gibberish.

For the date/time separators previous versions were inconsistent in the data provided, so use the separator you want, don't bother with the / : replacements listed above. Ie: if you want 9/10/2007 enter M/d/yyyy. If you want 9-10-2007 use M-d-yyyy.

Due to inconsistencies in the time separator behavior it is recommended that you set the long and short time patterns to the exact value you're interested in rather than trying to get the separator to be replaced. Eg: if you want h-mm-ss, then set...

This is derived from the short time format, so use that instead. Due to inconsistencies in the way data was handled this property isn't recommended. It is better to just set the expected separator in the short/long time pattern, eg: if you want h-...

Due to inconsistencies in the time separator behavior it is recommended that you set the long and short time patterns to the exact value you're interested in rather than trying to get the separator to be replaced. Eg: if you want h-mm-ss, then set...