Telegram
Bot for making sharable schedules of whatever may be scheduled
What can do this bot?This bot can create schedules. Schedule of classes? Streams on your channel? Meeting hours? Yes!
Once created they can be shared to everyone. Please refer to @ScheduleExBot for example
Команды бота
Все команды должны начинаться с символа «/».
Деньги за подписку 
States 
Google Calendar Bot