Leave Dates handles holiday requests and approvals; Slack is where the team asks who is off this week. FlowMattic posts new requests for managers, shares approved leave with the team, tells people privately when a request is turned down and sets handover reminders. For small and growing teams who manage time off in Leave Dates and work day to day in Slack.
5 triggers 14 actions 6 example workflows 2 ready-made templates Unlimited runs
When this happens in Leave Dates5 triggers
Do this in Slack14 actions
1. TriggerLeave Rquested2. ActionSend Channel MessageWhen Leave Dates fires Leave Rquested, FlowMattic runs Send Channel Message in Slack with the data from that event.
You build this in the FlowMattic workflow builder on your own site. See the setup steps
Each one uses only triggers and actions the two integrations ship today, plus FlowMattic's own tools. Where the library has a ready-made template, import it instead of building from scratch.
Ready-made templateThe employee, dates and leave type post as soon as someone asks for time off, so a manager can approve it the same day instead of finding it a week later.
Leave RquestedSend Channel Message
View the template Approved leave posts to the team channel with the dates, so colleagues know who is away and can plan cover without asking.
Leave ApprovedSend Channel Message
Find User by Email finds the employee in Slack and a DM explains the decision, which is kinder than a public post and quicker than waiting for an email.
Leave RejectedFind User by EmailSend Direct Message
Date/Time Formatter works out the working day before the leave, and Add Reminder nudges the employee to write a handover note for whoever covers.
Leave ApprovedDate/Time FormatterAdd Reminder
A cancellation posts to the same channel as the approval, so the team knows the person is back and cover plans can be dropped.
Leave CanceledSend Channel Message
Leave Updated posts to a private HR channel, so payroll and HR see changed dates without the change being announced to everyone.
Leave UpdatedSend Private Channel Message
At the end, every leave request in Leave Dates posts the employee, dates and type to your managers channel.
Under Connects in FlowMattic, add your company's Slack workspace.
Create a workflow with Leave Dates and its leave requested trigger, then follow the trigger's instructions so Leave Dates sends leave events to the workflow.
Request a day off in Leave Dates so FlowMattic captures the request fields.
Add Slack Send Channel Message, choose the managers channel, map the name, start and end dates and leave type, test it and switch the workflow on.
1. Trigger in Leave Dates
Leave Rquested
2. Action in Slack
Send Channel Message
Fields mapped from the earlier steps (a typical setup)
| From Leave Dates | To Slack |
|---|---|
| Employee name | Message: who |
| Start date | Message: from |
| End date | Message: to |
| Leave type | Message: type |
A trigger starts a workflow. An action is something FlowMattic does in the app as a step.
Leave Dates and Slack connect through FlowMattic on your own site, with no separate automation account in the middle and no charge per run.
Managers see each request in Slack, so people get a decision before they book flights.
Approvals and cancellations reach the team channel, which ends the morning round of who is in today.
FlowMattic runs on your WordPress site with unlimited runs, so staff details pass through a system you control.
Create a FlowMattic workflow with the Leave Dates trigger for new leave requests, follow its instructions so Leave Dates sends events to the workflow, then add Slack Send Channel Message with the employee and dates.
Yes. Build a second workflow with Leave Approved and post to the team channel. Use Leave Canceled in a third workflow so the channel is corrected when plans change.
Yes. Add a Filter on the leave type before the team post, or a Router that sends sick leave to a private HR channel and holiday to the team.
Set Status changes the status of the Slack account that is connected to FlowMattic, not other people's. Most teams post the leave to a channel instead.
Yes. A Router after the trigger reads the department or team and posts each request to that team's channel.
Did not find your answer? You can browse the help center or ask us directly.
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Reviewed 27 Oct 2026. The example workflows are written with AI from the real triggers and actions of both integrations and checked against them. Leave Dates integration 1.0.0, Slack integration 1.0.
