Zumba Fitness

Go to either Zumba Party or Zumba Class and select a workout routine. These workouts last 20mins/45mins/1hour. Complete the workout and your calendar date gets ticked.

This however seems a bit drastic and can be overbearing. Knowing that Zumba instructors would never advise you to workout 30days in a row without a break, you might hurt yourself after a while. Take it easy or just stand in the camera and do nothing. Walking away will cause your profile to turn into a Guest account. You can always sign back in but if you leave it to the last minute when results show up, your workout doesn't count towards your profile.

If you are impatient for this achievement you can always go offline and set the calendar date forwards, and backwards encase you have accidentally missed a date.
When you get a streak of 30 workouts, the achievement is rewarded after your final 30th workout on the results screen.

Single Routines (aka 1 song) DOES NOT COUNT!!

This achievement can get rather annoying if you do it legitimately. I did because I didn't really feel like spending that much time in one day doing Zumba. Like the previous solution states, you can set the calender date forward but be prepared for either extreme boredom or exhaustation. What I did was set up my Kinect so it would pick me up while I was sitting down. Then once I started up a 20 min class with my tag, I switched the input on my TV and watched something. Made the routine go fast and didn't take any work at all! The only bad part is that you have to make sure that you'll be near your Xbox for 30 days straight. I almost forgot a few times and did a class at 11:30 pm just in the knick of time! Whichever method you choose, I wish everyone the best of luck. This achievement takes dedication to unlock, that's for sure!