The patch is still not included (see previous comment from Carlos).
I've just started the migration process from 6.2 to 8.1 - so unable to adapt the patch ATM.
I see 2 options there:
wait for the patch to be included (I don't think I'll be able to do it until next year)
migrate it yourself (Carlos has explained what should be done to make it work in 8.1)
Hi , in 8.1 you can define the time format in language, see
It works, thanks.
But, It can’t save HH:mm pattern when AD_Language before save.
The change on language is global for all fields, reports, windows, forms.
If you really want to drop the seconds from all dates, you can set that valuevia SQL, but I think is not good to make it generally available.
I've created a pull request https://github.com/nmicoud/idempiere/tree/IDEMPIERE-3752 (is the conversion of the patch).
Is working for fields, but I can't make it work on InfoWindows, need to restudy it.
I'll also have to add FormatPattern on AD_UserDef_Info_Column.