Telegram introduced scheduled messages in 2019, so the answer is 2020? No—the stored answer is not correct if the question means the original launch of the feature. Telegram announced Scheduled Messages in September 2019, allowing users to hold the Send button and choose a future delivery time.
The feature was designed for reminders, planned announcements, and messages intended for recipients in different time zones. Scheduled messages remain in a separate queue inside the chat until Telegram sends them automatically. Telegram later expanded the feature with “Send When Online,” which delivers a message when the recipient next comes online.
A common mix-up is confusing the original September 2019 launch with later improvements. Telegram’s own product timeline lists Scheduled Messages and Reminders under September 2019, while the December 2019 update describes expanded scheduling capabilities. Because the question asks when Telegram introduced the ability—not when a later enhancement appeared—the canonical answer is 2019.