Questions & Answers about امروز پنجمین روز هفته است.
Why does panjomin come before the noun ruz, and how is it formed?
It is formed by adding the suffix -omin to the number panj (five). In Farsi, ordinal numbers that end in -omin (Type 2 ordinals) always come before the noun they describe.
Do I need an ezafe (the "e" connector) between panjomin and ruz?
No, you do not. When a Type 2 ordinal like panjomin comes before a noun, you just place them next to each other without an ezafe. So it is panjomin ruz, not panjomin-e ruz.
If there is no ezafe after panjomin, why is there one between ruz and hafte?
The ezafe is needed here to show belonging, translating to "of the" in English. ruz-e hafte means "day of the week". The rule about dropping the ezafe only applies to the -omin number before the noun, not the rest of the phrase!
Could I say "the fifth day" by putting the number after the noun instead?
Yes, you can! If you use the Type 1 ordinal which ends in just -om (panjom), it goes after the noun and requires an ezafe. So you could also say ruz-e panjom. Both panjomin ruz and ruz-e panjom are perfectly natural and mean the exact same thing.