Book 2 lesson 21 page 184 pdf

[Karim]

salamu allaikum wa rahmatu llahi wa barakatuhu,

in this sentence:
يسألونك عن الساعة أيان مرساها

now my question is, what is the meaning of ayana?

[Karim]

salamu allaikum,
im sorry a lot,
i found it myself in the madinna glossary,
its meaning is "when"