Telegram displays a banner at the top of your chat list when a contact in your address book has a birthday. This serves as a reminder directly within the app.
Here's a more detailed breakdown:
- Birthday Banner: When someone in your Telegram contacts has a birthday, a notification banner usually appears at the top of your Telegram chat list.
- Contact List Synchronization: Telegram needs access to your contact list to identify birthdays. Ensure Telegram has the necessary permissions to access your phone's contacts.
- Birthday Information in Contacts: Telegram relies on the birthday information stored within your phone's contact details for each person. If a birthday isn't added to the contact information, Telegram won't display a notification.
In summary, Telegram uses your contact list and the birthday information associated with each contact to generate a notification banner at the top of the app on their birthday.