If you're sad on a rainy day, here are a few ideas that can help lift your spirits:

Create a cozy atmosphere: Light candles, make a hot drink (like hot chocolate or aromatic tea) and wrap yourself in a warm blanket. It can help you relax and create a cozy mood.

Take up a hobby: On a rainy day, you may have more time to pursue your hobbies. For example, take up reading, painting, knitting, playing a musical instrument, or anything else that interests you.

Watch a Movie or TV Show: Have a little movie marathon and enjoy watching a movie or TV show that will entertain or inspire you.

Listen to music: Play your favorite songs or create a playlist of calm and relaxing music. Music can help lift your spirits and create positive emotions.

Get physically active: Physical activity helps release endorphins, the feel-good hormones. Try doing the exercises at home, follow the workout videos, or just dance to your favorite music.

Connect with loved ones: Spend time with family or friends. Connecting with loved ones can lift your spirits and help you feel better.

Write or draw your thoughts: Sometimes putting your feelings and emotions on paper can help deal with sadness. Try writing in a diary or start keeping a notebook for drawing and creativity.

Remember that each person is unique, so experiment with different activities and find what works best for you to cope with sadness and cheer up on a rainy day.