Sure, here are 12 short happy and joyful sentences:
1、The sun is shining, and the birds are singing.
2、I am surrounded by love and positivity.
3、Every day is filled with new opportunities and possibilities.
4、I am grateful for the simple pleasures in life.
5、Laughter and joy fill my heart every day.
6、Kindness and compassion guide my actions.
7、I am at peace with myself and the world around me.
8、Every moment is a chance to create beautiful memories.
9、I am blessed with wonderful friends and family.
10、Love and happiness flow through every aspect of my life.
11、Each day is a new chance to spread joy and make someone smile.
12、I am content and joyful, embracing the beauty of life.
I hope these sentences bring a smile to your face!