Date and Time Picker Not Showing Calendar

[Puneet Hegde1]

Hi Community,

I’m running into a global issue with all date-time pickers in our instance:

• Symptom:

  • Calendar renders the header (month / year) and “1”, but the rest of the grid is blank.

  • Time section appears but is not clickable.

  • Screenshot attached for reference.

• Where it happens:

  • Native UI forms

  • Service Portal catalog items, record producers, and widgets

  • Works the same (broken) in Chrome, Edge, and Firefox, including incognito.

• Environment details:

  • No UI Script or CSS overrides applied recently.

  • Using the out-of-box glide_date_time field type and the standard sp-date-time-picker widget.

  • Tested with a brand-new Date/Time variable on an empty catalog item → still broken.

• What I’ve tried so far:

  1. verified all client scripts & UI policies affecting the field.

  2. Cleared browser cache, tried different browsers/machines.

  3. Checked browser console – no JS errors related to the picker.

  4. Verified field dictionaries (all are Date/Time).

  5. Compared against an untouched Personal Developer Instance (that instance works fine).

Questions

1. Has anyone seen this across the entire instance before?

2. Could this be tied to a missing / corrupted UI script?

3. Any known hotfixes or PRBs for blank calendars in Xanadu or later?

4. Is there a way to re-load the date-picker?

Any pointers or similar experiences would be greatly appreciated!



Thank you,
Puneet

[Ankur Bawiskar]

@Puneet Hegde1 

Did you recently upgrade?

when was this working fine?

If my response helped please mark it correct and close the thread so that it benefits future readers.

[Puneet Hegde1]

We are migrating from one servicenow instance to another instance our target instance has the issue and this issue has persisted for the past 1 year, it seems

[Dr Atul G- LNG]

Hi @Puneet Hegde1 

Looks like some upgrade/update issue. Try to repair the SOW plugin once and see if the issue get resolved. try cache.do as well else log a Now Support case.

[Puneet Hegde1]

Hi Atul,
We are migrating from one servicenow instance to another instance our target instance has the issue and this issue has persisted for the past 1 year. I'm not sure which plugin I need to check.