What is the purpose of zone and timezone both exist in dtstart?

[piavgh]

When using console.log on dtstart value, I usually see 2 fields:

{
  ...
  timezone: 'Asia/Ho_Chi_Minh',
  zone:
   { wrappedJSObject: [Circular],
     expandedUntilYear: 0,
     changes: [],
     tzid: 'floating' } }
  ...

Why do you need zone property if it already has the timezone?

Thanks. @asutherland @kewisch

[kewisch]

Certainly some ambiguity, one is the tzid, the other is the actual zone object if one is associated. Closing this issue unless you feel there are any improvements we can make.