ASH WEDNESDAY is Wednesday, March 2. Mass will be held at 7 AM, 10 AM, and 7 PM
This holy day marks the beginning of Lent and is an obligatory day of fasting an abstinence for Catholics.
You can learn more about fasting and abstinence (and to whom it applies) on the USCCB's site.
If you have another question about Lent, it may very well be covered in this article from Catholic Answers.