If a user changes their birth date less than a day before their birthday, their friends won’t get a notification. If no changes were made, then it’s a bug. Our developers know about this bug, but a solution hasn’t been found yet. We hope that it will be fixed in the near future.
You can also get a notification in the chat with the person whose birthday is soon. It is displayed in the VK app for iOS and Android as well as the mobile version of VK. The notification will disappear if you sent the user a present already or tapped on the banner with it.
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