1. It's not "all timezones across the world" but rather Windows time zones from a particular version of Windows. Most people use the much more accurate Olson database that actually gives you correct time offsets, daylight savings rules, etc.
2. Your option values, i.e. offsets, are either meaningless, or if someone actually uses them, erroneous. For example, current UTC is 17:40 but current Central is 12:40 not 11:40. Again, use the Olson database if you want better time conversions - Windows offset numbers are just a part of the timezone name, not an actual offset.
3. Timezone names differ depending on the language settings on your PC, and your list is only a small EN subset of the time zones, which, given the international nature of the list, is not very useful. If your users are in a non-American time zone, it is very likely that their time zone name is not on your list.
4. Timezone names differ from version to version, and are not backward compatible. Your list is only correct for whatever version you collected it on so it should be identified as such. Even better, if someone actually needs Windows timezones - like I said above, most likely you need the Olson timezones - they should take them from the source, by running the tzutil utility, or from microsoft.com.
Your list should be identified as what it is, a list of Windows time zones, (?) OS version. Even then, it's dangerous that whoever stumbles upon it will use the offsets for time conversions.