It is normal to travel during May Day. Maybe your mother is afraid of a big flow of people during May Day and an accident. Which child is not the heart of parents (but she is in college and should have the ability to protect herself, so stop it when she goes out. )
It also depends on the family's economic situation.
If there is no big problem, traveling is normal. You can broaden your horizons and understand the great rivers and mountains of the motherland. After the tour, bring some souvenirs to your family or elders. It doesn't need to be expensive. It's good to have a heart. Parents will think that you have grown up and won't be so worried about you in the future.
You talk to your mother calmly, tell all the relationships and benefits, and make sure you are careful not to cause trouble when you go out. It's best to go out with friends your parents know who are more reliable, and there are more people going out together. That will give you a better chance.
If it doesn't work, forget it. When I have a job, I will have enough time to go out. It's not good to be rude to your family. Don't decide to go out by yourself in anger, because parents will be very worried.
Having written so much, you should know something. If you think it's right, give it some points. . . .