Prerequisites

• I have searched for duplicate or closed issues
• I can recreate the issue with all plugins disabled

Describe the issue

When you create a vacation filter (in the Out of Office UI) with start and end date/time it results in:

if allof (currentdate :zone "+0100" :value "ge" "date" "2026-01-01", currentdate :zone "+0100" :value "le" "date" "2026-01-15")
{
    vacation...
}

If you then go to the Filters UI such filter is displayed as "contains" filter, which is wrong and if you press Save it will be replaced with something that is not the same.

So, we need to support relational operators (:value) for currentdate conditions. Also :zone will need some support.