Here is the full list of all 12 Day Repeat Day achievements.
Completed another day
Completed your first day
Completed a day more
Another day went by
Again, completed another day
Completed yet another day
Had a lot of dedication to your craft
Worked a lot of overtime like a true hero, congratulations
Had many people to chat with, during working time no less
Completed one iteration
Took the step
The final repeat