Scheduled Messages • Hold the 'Send' button and select 'Schedule Message' to automatically send something at a specified time

Scheduled Messages
• Hold the 'Send' button and select 'Schedule Message' to automatically send something at a specified time.
• Schedule reminders for yourself in the 'Saved Messages' chat.
• Get a notification when any of your scheduled messages are sent.

Custom Cloud Themes
• Customize your app's appearance by choosing unique colors from the color wheel for the 'Day' and night themes.
• Сreate new themes based on your color and wallpaper choices.
• Share your themes with other users via links.
• Update your theme for all its users when you change something.

Redesigned Message Options
• Hold any message to open the options menu, redesigned in the style of iOS 13.
• Select part of the text in any message to copy, share, etc.

New Privacy Settings and More
• Choose who can find you on Telegram when they add your number to their phone contacts.
• Send a single 😁, 😧, 😡, 💩, 😢 or 😮 to check out what's new in the animated emoji department.
• Enjoy improved VoiceOver support.

More about this update:
https://telegram.org/blog/scheduled-reminders-themes