vanci -vac- gismu

x1 is an evening [from end-of-work until sleep typical for locale] of day x2 at location x3.

This evening (= cabvanci); tomorrow evening (= bavlamvanci); yesterday evening (= prulamvanci). See also cerni, murse, tcika.

In notes:

cerni
x1 is a morning [dawn until after typical start-of-work for locale] of day x2 at location x3.
murse
x1 is the [astronomical] twilight/dawn/dusk/half-light/glimmering of day x2 at location x3.
tcika
x1 [hours, minutes, seconds] is the time/hour of state/event x2 on day x3 at location x4.
dormijbalvi
b1 is later than noon of day d2 at location d3.