Snapchat allows users to change their birthday only a limited number of times. However, please note that Snapchat's policies and features might have evolved or changed since then. To get the most accurate and up-to-date information, I recommend checking Snapchat's official support documentation or contacting their customer support directly.
How Many Times Can You Change Your Birthday On Snapchat?
Previously, Snapchat allowed users to change their birthday a maximum of one time. After you set your birthday, you could not modify it again. This restriction was in place to prevent users from frequently changing their birthdate, as it could potentially lead to misuse of the platform or violation of age-related policies.

If you have already changed your birthday once, you won't be able to change it again through the app's settings. If there's a legitimate reason to update your birthday, such as an error during the initial setup, you may contact Snapchat support and explain the situation to see if they can assist you.

To change your birthday (if it's still possible and you haven't reached the limit):

Open Snapchat: Launch the Snapchat app on your mobile device.

Access Settings: On the camera screen, tap on your profile icon in the top left or swipe down to access your profile.

Go to Settings: Tap on the gear-shaped icon in the top right corner to access your account settings.

Edit Birthday: Scroll down to find the "Birthday" section. If it's editable, you can tap on it and adjust your birthdate as needed.

Confirm Changes: After entering your new birthdate, Snapchat may prompt you to confirm your choice. Verify your selection, and your birthday will be updated.

Again, please be aware that the ability to change your birthday may be subject to changes in Snapchat's policies. If you cannot find the option to modify your birthday or encounter any limitations, refer to the official Snapchat support or reach out to their customer support for assistance.