Detect Holiday Conflicts & Suggest Meeting Reschedules with Google Calendar and Slack

Description

Who’s it for

Remote and distributed teams that schedule across time zones and want to avoid meetings landing on public holidays—PMs, CS/AM teams, and ops leads who own cross-regional calendars.

What it does / How it works

The workflow checks next week’s Google Calendar events, compares event dates against public holidays for selected country codes, and produces a single Slack digest with any conflicts plus suggested alternative dates. Core steps: Workflow Configuration (Set) → Fetch Public Holidays (via a public holiday API such as Calendarific/Nager.Date) → Get Next Week Calendar Events (Google Calendar) → Detect Holiday Conflicts (compare dates) → Generate Reschedule Suggestions (find nearest business day that isn’t a holiday/weekend) → Format Slack Digest → Post Slack Digest.

How to set up

Open Workflow Configuration (Set) and edit: countryCodes, calendarId, slackChannel, nextWeekStart, nextWeekEnd.

Connect your own Google Calendar and Slack credentials in n8n (no hardcoded keys).

(Optional) Adjust the Trigger to run daily or only on Mondays.

Requirements

n8n (Cloud or self-hosted)

Google Calendar read access to the target calendar

Slack app with permission to post to the chosen channel

A public-holiday API (no secrets needed for Nager.Date; Calendarific requires an API key)

How to customize the workflow

Time window: Change nextWeekStart/End to scan a different period.

Holiday sources: Add or swap APIs; merge multiple regions.

Suggestion logic: Tweak the look-ahead window or rules (e.g., skip Fridays).

Output: Post per-calendar messages, DM owners, or create tentative reschedule events automatically.