To understand Sharepoint calendar event timezones, I used the Sharepoint REST APIs to get various calendar events, and discovered the rules in the table below. Are these rules true for all calendar events?
| Item type | TimeZone | XMLTZone |
|---|---|---|
| Normal event | null | null |
| Not all day recurrent event | site timezone id | site timezone info |
| Not all day recurrent event exception (edit or delete) | site timezone id | null |
| All day recurrent event | 0 | "<timeZoneRule><standardBias>0</standardBias><additionalDaylightBias>0</additionalDaylightBias></timeZoneRule>" |
| All day recurrent event exception (edit or delete) | 0 | null |