3月份是一年中充满活力和喜庆气氛的月份，许多国家和地区都有自己的节日和庆祝活动。下面是关于3月份的节日的英语介绍：

1. International Women's Day (国际妇女节)

International Women's Day falls on March 8th every year. It is a day to celebrate the social, economic, cultural and political achievements of women, as well as a call to action for gender equality.

2. St. Patrick's Day (圣帕特里克节)

St. Patrick's Day is celebrated on March 17th, and is a cultural and religious holiday in Ireland. It is also celebrated in many other countries around the world, with parades, feasts, and the wearing of green.

3. Holi (霍莉节)

Holi is a Hindu festival that is celebrated in India and other countries with large Hindu populations. It is known as the 'Festival of Colors' and is celebrated on the full moon day in the Hindu month of Phalguna (usually in March). During Holi, people throw colored powder and water at each other, dance, and feast.

4. March Equinox (春分)

The March Equinox marks the beginning of spring in the Northern Hemisphere and the beginning of autumn in the Southern Hemisphere. It falls on March 20th or 21st and is a time of balance between day and night.

In conclusion, March is a month full of diverse and meaningful festivals and celebrations. Whether you are celebrating women's rights, Irish heritage, Hindu culture, or the changing of the seasons, there is something for everyone to enjoy.