Unable to update ListItem with DateTime property

[kavrat]

Category

• Bug

Describe the bug

I'm trying to update a listitem with the DateTime property with a new value in UTC format, but I got an error:

Exception: System.ArgumentException: Unknown timezone mapping
[2024-06-20T15:19:08.619Z] at PnP.Core.Model.SharePoint.TimeZone.GetTimeZoneInfoFromSharePoint(Int32 timeZoneId)
[2024-06-20T15:19:08.619Z] at PnP.Core.Model.SharePoint.TimeZone.UtcDelta(DateTime dateTime)
[2024-06-20T15:19:08.620Z] at PnP.Core.Model.SharePoint.TimeZone.UtcToLocalTime(DateTime dateTime)
[2024-06-20T15:19:08.621Z] at PnP.Core.Model.SharePoint.ListItem.DateTimeToSharePointWebDateTimeString(PnPContext context, DateTime input)
[2024-06-20T15:19:08.622Z] at PnP.Core.Model.SharePoint.ListItem.BuildValidateUpdateItemPayload(PnPContext context, KeyValuePair2 changedProp, Object field) [2024-06-20T15:19:08.622Z] at CallSite.Target(Closure, CallSite, ListItem, PnPContext, KeyValuePair2, Object)
[2024-06-20T15:19:08.623Z] at PnP.Core.Model.SharePoint.ListItem.BuildUpdateApiCallAsync(PnPContext context)
[2024-06-20T15:19:08.624Z] at PnP.Core.Model.SharePoint.ListItem.BaseUpdate(Func2 fromJsonCasting, Action1 postMappingJson)
[2024-06-20T15:19:08.625Z] at PnP.Core.Model.BaseDataModel`1.UpdateAsync()

TimeZone of SharePoint site - (UTC-12:00 International Date Line West)
Locale - German

Expected behavior

ListItem should be updated as expected

Environment details (development & target environment)

• SDK version: 1.12
• OS: Windows 11
• SDK used in: Azure Functions
• Framework: .NET 8.0
• Tooling:Rider IDE

[jansenbe]

@kavrat : I've tried to reproduce this but am failing to do so. Can you show the code you use to update the ListItem? Do you seen the same issue on with other timezones/languages as well?