Each year, you might get the chance to see Catholics and other Christians walking out of church especially on Wednesday this week with what appears to be dirt crosses on their foreheads. It’s Ash Wednesday, which is the first day and the start of Lent. Some people may be unclear about their obligations, so here are five things to remember:

1. What if I can't make it to Mass? Ash Wednesday is not a holy day of obligation compared to the days during Holy Week but it's a good idea if you can make it to mass. And if you can't, that's still fine. Just make sure to get the ashes. According to Aquinas & More, a Catholic website, there is no need to push for a confession.

2. How long do Catholics keep the ashes on their forehead? There's no specific instruction for how long the ashes should stay on your head. If you want, you can wash it off after the service, if you so wish. Some just choose to wear it during the whole day.

3. When did Catholics begin placing ashes on the forehead? If someone ask you that question, you should know that the Christian Bible refers to using ashes in several books but the shaping it into a cross dates back to around 960. During the 12th century, people started to burn palm branches for the ashes.

4. Do Catholics have to fast on Ash Wednesday? It is advised to fast. While other religions require abstaining from all food and drinks during a specific period, Catholics are permitted to eat one full meal and two smaller meals. The rules apply to people between 18 and 59 years old for Roman Catholics.

Some exceptions apply especially for people who are ill, frail or pregnant which also includes breastfeeding mothers. Some are more lenient than others. According to the Global Catholic Network, physical and manual laborers are exempt from the rules if they need the energy to work during the day.

5. What’s the deal with abstaining from meat? According to CNN, it is a popular misconception that Catholics are required to abstain from meat every day of Lent. In truth, it is only on Ash Wednesday and Friday that requires Catholics to abstain from meat in remembrance of the sacrifice Jesus made on Good Friday.

Hopefully, these answers your questions about Ash Wednesday.