Birthday information for a user.
Also used to invite users to gift Telegram Premium subscriptions » to other users with birthdays within a +1/-1 day time range, related to the current day.
birthday#6c8e1e06 flags:# day:int month:int year:flags.0?int = Birthday;| Name | Type | Description | 
|---|---|---|
| flags | # | Flags, see TL conditional fields | 
| day | int | Birth day | 
| month | int | Birth month | 
| year | flags.0?int | (Optional) birth year. | 
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