I forgot to track for a challenge, can I still complete it?

In some cases, a challenge will have a seven-day grace period (beginning immediately after the challenge end date) in which you can add or update your challenge tracking activity within the challenge start and end dates.

If you missed a day of tracking during the challenge, you have the opportunity to update your challenge-tracking activity while the challenge and plan year is still active

There is no seven-day grace period on the Health Assessments, Biometrics, or University course challenges. 

What are the different types of challenges?