Format -date resulting an invalid date

Thank you, @Dnes, for checking it out with Collect android app and confirming that it works at your end. @bizaheran, I checked the same with Enketo, and it works perfectly for me.

xlsform as seen in the survey tab:

Data entry screen as seen in Enketo:

Data as seen in the KoBoToolbox server:

xlsform:

SLL date-time.xlsx (16.5 KB)