If you mean "good day" literally, as in "I had a good day", you can say "Yawm jayyid" (يوم جيد) or more commonly, "Yawm jamil" (يوم جميل).
If you mean "good day" as a formal greeting, you can say "Salaam 3alaykum" (سلام عليكم) (Peace be with you) or depending on the time of day, you can say Sabaah al-khair (صباح الخير) (Good Morning) or Masaa al-khair (مساء الخير) (Good Evening).
you have to convert it to Arabic. search for an audio English to Arabic translator.مرحبا
al ayam
In Algerian Arabic, you can say "يوم سعيد" which is pronounced as "youm sa'id" and is similar to saying "good day" in English.
One day in Arabic is يوم واحد (yawm wahid).
Kaefa howa yawmok?
shoo el yom
In Arabic, you can say "صباح الخير" (pronounced: sabah al-khayr) to say hello and good morning.
The Egyptian language is Arabic. In Arabic, good afternoon is said: masaa alkher
yawm(un) jadeed(un)
ibka jayid ابقى جيد
I am good : in Egyptian accent if you are a boy you say : ana kwayyes if you are a girl you say : ana kwayyesa
If you want to say Arabic in Arabic this is how you say it=Arabi