What It Does
Outlook has no feature called 'a more secular outlook'. That phrase doesn’t exist in any menu, option dialog, or ribbon tab. What people mean — every single time — is one of two things: (1) suppressing automatic holiday labels in the Calendar view, or (2) preventing Outlook from auto-adding religious holidays to shared calendars or delegate-access mailboxes. It’s not about belief. It’s about clean, neutral scheduling. This isn’t philosophy. It’s formatting. Outlook pulls holiday data from Windows regional settings and Microsoft 365’s built-in holiday sets. When your IT department deploys a global tenant, it often enables 'U.S. Holidays' by default — which includes Christmas Day, Thanksgiving, and Easter Sunday. But your Tokyo-based engineering team doesn’t observe those. Neither does your Lagos sales lead. And if you’re managing a shared mailbox like marketing@company.com, those holidays appear for everyone — whether relevant or not.How to Set It Up
You don’t 'enable' secular outlook. You disable unwanted holiday layers. Do this on your desktop client first. Open Outlook. Go to File > Options > Calendar. Scroll down to the 'Calendar options' section. Uncheck 'Show holidays in month view'. That’s it for your personal calendar. For shared mailboxes or delegate access: you must act as the mailbox owner. Open the shared mailbox (File > Account Settings > Account Settings > Email tab > click 'Change' next to the shared account). Then go to its Calendar > View > View Settings > Other Settings. Uncheck 'Show holidays'. In Outlook on the web: click the gear icon > View all Outlook settings > Calendar > General. Toggle off 'Show holidays'. Note: this only affects your own view — not others’ views of the same shared calendar. Keyboard shortcut: Alt+H, then V, then O opens View Settings directly in Calendar — faster than digging through menus.Configuration Options
Here’s what each setting actually controls — and where it applies across versions:| Setting | Outlook 365 | Outlook 2019 | Outlook Web | Affects Shared Mailboxes? |
|---|---|---|---|---|
| Show holidays in month view | ✓ Yes — per user | ✓ Yes — per user | ✓ Yes — per user | ✗ No — only personal view |
| Default holiday set (e.g., U.S., UK, Japan) | ✓ Set via Windows Region & Language | ✓ Set via Windows Region & Language | ✗ Not configurable — uses tenant default | ✗ No — determined at tenant level |
| Holiday visibility in shared calendar | ✗ Only if owner disables it manually | ✗ Only if owner disables it manually | ✗ Not controllable per shared calendar | ✓ Yes — owner must uncheck in their View Settings |
| Delegate sees holidays in your calendar | ✓ Yes — unless you disabled them first | ✓ Yes — unless you disabled them first | ✗ Delegates use their own holiday settings | ✗ Not synced — each person controls their own display |
| Custom holiday removal (e.g., delete 'Good Friday') | ✗ Impossible — built into OS | ✗ Impossible — built into OS | ✗ Impossible | ✗ Cannot remove individual holidays |
Real-World Examples
Example 1: The Global Team Sync Gone WrongMichael Rodriguez (Mexico City), James O'Brien (Dublin), and Priya Sharma (Chennai) all share product-launch@company.com. Outlook auto-added 'St. Patrick’s Day' to the shared calendar. James thought it was a team holiday and canceled his 10 a.m. slot. Michael assumed it was a hard block and rescheduled his client call. Priya ignored it — and showed up for the sync confused. Fix: As owner of the shared mailbox, Michael went to Calendar > View Settings > Other Settings and unchecked 'Show holidays'. Done in 20 seconds. Example 2: HR Policy Compliance
Your company’s internal HR policy prohibits religious references in official scheduling tools. But Outlook added 'Ramadan Start' to the corporate-wide shared calendar. You can’t delete it — but you can prevent it from displaying. Go to File > Options > Calendar and uncheck 'Show holidays in month view'. Then tell your IT team to disable automatic holiday sync at the tenant level (via Microsoft 365 Admin Center > Settings > Org Settings > Calendar > Holiday Display). Example 3: Delegate Access Confusion
Your executive assistant sees 'Thanksgiving Day' highlighted on your calendar — but you’re based in Singapore and don’t observe it. She assumes it’s a hard stop and blocks your afternoon. You didn’t ask for that. You didn’t set it. Outlook did — based on her Windows region setting, not yours. Solution: Tell her to disable holidays in her own File > Options > Calendar. Her view changes. Yours stays clean.
Limitations and Gotchas
Outlook doesn’t let you pick and choose holidays. You get the full set for your Windows region — or none. There’s no 'remove Easter, keep Labor Day' option. No version does this. Outlook 2016 and earlier don’t support disabling holidays in shared mailboxes at all. You’ll see them — and so will everyone else. Upgrade to 2019 or 365 if this matters. Admins can override your personal settings. In Microsoft 365 Admin Center, under Settings > Org Settings > Calendar, an admin can enforce holiday visibility for the entire tenant. If that’s turned on, your local 'uncheck' does nothing. The biggest gotcha? Holidays appear in the 'Date Navigator' on the right side of Calendar — even when disabled in month view. That panel doesn’t respect your setting. To hide it entirely, right-click the Date Navigator > 'Hide Date Navigator'. One counterintuitive tip: Don’t waste time trying to edit the holiday list. Instead, create a custom 'Company Events' calendar — and populate it only with dates your team actually observes (e.g., 'Q3 Kickoff', 'Server Maintenance'). Then share that calendar instead of relying on Outlook’s auto-holidays.| Task | Desktop Shortcut | Web App Path |
|---|---|---|
| Disable holidays (personal) | Alt+F + T → Calendar → uncheck | ⚙️ > Calendar > General > toggle off |
| Disable holidays (shared mailbox) | Switch to mailbox → Calendar → View Settings → Other Settings | Not supported — must use desktop |
| Hide Date Navigator (removes rogue holiday panel) | Right-click Date Navigator → Hide | Not available in web app |
