Learn how to schedule a message in Slack for iPhone or Mac and for timely communication without disturbing your colleagues at odd hours.

Slack offers several features that make it a great tool for work. One of them is the ability to schedule a message so as to not disturb your colleague at odd hours. If your colleagues work across time zones, this also benefits you as you can schedule your messages for a future time accordingly and not have to open your laptop during off hours.
Also see: How to schedule messages on iPhone, iPad, and Mac
Schedule a Slack message on iPhone or iPad
1) Open Slack on your iPhone or iPad and go inside an individual chat or channel.
2) Compose your message.
3) Touch and hold (not tap) the send button and a Schedule message screen will pop up.
4) Select the suggested time or tap Custom Time to pick the desired date and time.
If your colleague is in a different time zone, Slack will display what the time will be on their end. This helps you pick the time accordingly.
5) With all set, tap the Schedule Message button.
Your message is now scheduled and will be sent at the set time. You can tap See all scheduled messages to make changes, hit the tiny rescheduled icon to change the time, or swipe left and hit the delete icon if you want to cancel the schedule.
Schedule messages in Slack on Mac or web browser
1) Open the Slack app on your computer or visit it in a web browser.
2) Compose your message to a colleague or channel.
3) Click the tiny arrow next to the send button.
4) Pick a suggested time or a custom time.
Once again, Slack will show you the time it will be for your teammate if they live in a different time zone.
5) With everything in order, click the Schedule Message button.
See all your scheduled messages in one spot
When you schedule a message on Slack, a “See all scheduled messages” link appears in that conversation. In addition to that, you can also see all your scheduled messages across all your colleagues in one convenient spot.
On iPhone or iPad: Tap the Drafts & Sent tile from the top of the Home tab in the Slack app. Now, go to the Scheduled section to see all your messages that are configured to be sent later.
On Mac: Click Drafts & Sent from the left sidebar and select the Scheduled option.
Other Slack tips for you: