This line fails because the IE11 Date constructor doesn't like the "from" or "to" formats found in the timezone data. We only see a problem when there is more than one entry in metaNameData since otherwise it picks it automatically. For example I tried "America/Anchorage".

Full command line example:
new Date().toLocaleString("en-US",{timeZoneName: "short", timeZone: "America/Anchorage"})

Try this on the command line and see it fail in IE but work elsewhere:
new Date("1983-11-30 09:00-08:00")

Now replace the space with "T" and it works.
new Date("1983-11-30T09:00-08:00")

So that's the fix. Replace space with "T".