Hello,

According to the guidelines of CBSE(Central Board of Secondary Education) a student must have completed the age of 8 years to get into 4th grade.
Please note that Maximum and minimum ages are considered as on 31st March of the academic year . Your child will complete 8 years on 25th August, 2021 so, he/she might not be eligible for getting admission in 4th Class of CBSE board.
Though the required age criteria for admission varies from school to school.For that you need to check the eligibility criteria of different CBSE schools.

Hope it helps
Thank you !!!