I am using many _spPageContextInfo properties in my development and it works well but suddenly from last few weeks_spPageContextInfo.userTimeZoneData is not working.
User has updated timezone before 2-3 months and it was working fine.
Sometime it sends NULL even user has not done any activity in delve profile since long.
I am trying to ignore additional query/JSOM call to find out user timezone.
Any help is appreciated!