If you do not want to wait a whole month to get this achievement, then you can change your local time in your PC settings. Somehow you will be able to play every challange of every past day/month and still get the achievement.
EDIT Credit: Espio Idsavant
"Changing the date on your computer does work (that's how I did it), but there is an important step the instructions above leave out: completely close the game, force closing it through task manager if you have to. Method summary:
- Ensure you are starting a month that you have not done any challenges in yet
- Make sure the game is closed - check task manager - I've seen this game close but without ending the actual task.
- Change your clock to the first day of the month
- Open the game, do at least one challenge
- Close the game, increment the day by one, reopen, repeat
The other thing I did - which I'm not sure if it is required - is I didn't backtrack once I moved to further days -- if I had only done 1 challenge for day 2 before moving one, I didn't try to do the other challenges for day 2 until after I unlocked the achievement."
This method will also help you to get the following achivements "faster":
- Win 12 bronze DC badges
- Win 10 silver DC badges
- win 8 gold DC badges
- Win 1 diamond DC badge
- Complete every Daily Challenge in 1 month
- Play DC 5 days in a row