How to Schedule Slack Messages
1. Start by typing out the message you want to send until it has the right number of exclamation points and emojis.
2. On the mobile app, look for the green paper airplane button in the bottom-right corner. Press and hold it.
3. Slack will suggest a scheduled time -- usually 9 a.m. the next weekday. If the recipient is in a different time zone
4. The custom time menu will let you specify whatever date and time you want, up to four months in advance.
Best reasons to schedule Slack messages
Send a message late at night without waking up the recipient. It'll be ready for them when they start their day.
Remind a person or a channel about a deadline. You can send the message whenever you first set the deadline, and schedule it for crunch time.
Remind yourself about tasks you need to finish. Slack also has a reminder tool that you can use, but scheduling a message is a little faster.
CLICK HERE FOR MORE INFORMATION