This Time Next Year
Synopsis
In possibly the most borderline game show ever, contestants make a pledge on what they aim to achieve in 365 days. They range basically anything and everything from losing weight, finding a date, overcoming a personal fear, expressing a talent they have etc. and they have until next year to successfully complete their pledge and explain how they were successful in completing their pledge. If they fail to complete their pledge, they will have to explain what went wrong and how they weren't able to achieve their pledge.
See also
Change Your Tune, which also employs an instantaneous time-travel mechanic, but for singing.