What are the time limits for contesting a will?

To contest a will:

you must act within two years after the date that the will is probated,
if you were a minor when the will was probated, you have until your 20th birthday to act,
If you were a servicemember when the will was probated, you typically have until 2 years after termination of service to file a contest, and
in cases of fraud there is no formal time limit, as long as you act with reasonable haste after detecting the fraud.