We’ve just fixed a bug that was preventing users in regions where the time is ahead of GMT from scheduling email marketing campaigns with GMass and Gmail.
If you were in such a region, generally defined as east of London in the United Kingdom, and you attempted to use the Scheduling field to schedule a mass email send for the future, you might have seen this in the date/time field:
01/29/2016 08:00am -NaN:NaN
Instead of seeing your actual time zone offset, the nonsense text “-NaN:NaN” was displayed.
This issue was due to a coding syntax error, and only affected users with a positive time zone offset. The United States and all of North America operates on a negative time zone offset, so those users would not have been affected, but users in India or China for example, would not have been able to schedule mass emails for a future time.