word - My first attempt at a tyobrien riddle

A very easy @tyobrien riddle

With 1: A word used every day, in fact in this riddle
With 2: You could be __ a party
With 3: it is something you did yesterday
With 4: it is the Egyptian disk of the sun
With 5: You could  _____ a party

Answer

With 1: A word used every day, in fact in this riddle

A

With 2: You could be __ a party

At

With 3: it is something you did yesterday

Ate

With 4: it is the Egyptian disk of the sun

Aten

With 5: You could _____ a party

Atend (should be "attend")