Native speaker
In Emirati Arabic, “Monday” is الأثنين (al-ithnayn).
الأثنين
Monday
It's in the phrasebook under Time, days & appointments, with 26 more like it.
al-ahad
ath-thalaathaa
al-arba'aa
al-khamees
al-jum'a
as-sabit
Source: DLIFLC Emirati Basic Language Survival Kit (2007). Credits and licences