How to Remove Duplicate Holidays from Outlook Calendar Instantly

  author
Written By Nimisha Ramesh  
Anuraag Singh
Approved By Anuraag Singh 
Modified On May 14th, 2026
Reading Time 8 Minutes Reading
Instant Solution: If users want to remove duplicate holidays from Outlook calendar, then open Outlook and navigate to Calendar tab. Change its default view to list view. Look for duplicates and delete all redundant holidays. Or use an automated software by SysTools to save both time and effort.

We know that these duplicate holidays in Outlook calendar can easily make it cluttered and messy, leading to confusion among users. Multiple users have reported that these repeated holidays, that includes both regional and public, are appearing in their calendars. So, if you are searching for how to delete duplicate holidays from Outlook calendar, then we will guide you to resolve and prevent them using this article. Moreover, we will discuss both manual and automated methods on desktop, Web, and Mac.

But first, user should be aware of possible reasons for appearance of duplicate holidays. Let’s get to article.

Why Do Duplicate Outlook Calendar Holidays Appear?

Before anyone dives into solutions, it becomes very important to understand root causes of why duplicate holidays occur. Let’s walk through these possible reasons.

  • If someone uploads holidays in Outlook calendar more than once. This leads to duplication of holidays.
  • Someone installs Outlook profile again, so due to syncing error, calendar items get duplicated.
  • If one has configured their account on multiple devices, then items might get replicated because of sync issue.
  • Adding public or regional holidays manually again to Outlook calendar.
  • Using any third party calendar add ins can also be reason for duplication of holidays.

Due to these above reasons, users often see holiday events twice or even three times in their calendar. To know actual reason will help users to know which solution or approach to choose. Now, let’s go through some proven steps to delete duplicate events on Outlook calendar on Desktop, Mac, and Web (OWA).

4 Proven Ways to Remove Duplicate Holidays from Outlook Calendar

In this next section, we are going to share with you some of best approaches for deleting duplicate Outlook calendar holidays. This will surely help users to remove and prevent them in future. Here are some mentioned below:

  1. On Desktop (Manually)
  2. Try Standalone Software (Professional)
  3. On Mac OS
  4. On Outlook for Web (OWA)

Let’s discuss them with their complete explanation and steps.

#1: Remove Double Holidays Outlook Calendar on Desktop

This approach is for all Outlook Classic or Desktop users on Windows. To remove duplicate holidays in Outlook calendar, follow steps given below:

Steps:

  1. Open Outlook and navigate to Calendar section.
  2. Press View tab and change default view to List View.
  3. All calendar items that include holidays will be displayed in list format.
  4. Now, write holiday name in search bar and look for duplicates.
  5. Select all duplicate holiday events and remove them.
It is most easy and simplest way to deduplicate holidays from Outlook Calendar. But it has many restrictions as it is very time taking deletion process and can disorganize calendar list. So to prevent it, we recommend using a dedicated software that automatically detect and bulk remove duplicate holidays from Outlook Calendar.

#2: Try Automated Tool to Delete Duplicate Holidays in Outlook Calendar

If someone does not want to use manual method and is looking for smart solution that can offer secure and instant result without losing any data integrity. Then use SysTools Outlook Duplicate Remover Tool. This dedicated software scans and remove double holidays Outlook calendar in batch mode on both Windows and Mac machines.

 
It can effectively help users to save their precious time and effort, and prevent users from having cluttered calendars. This most trusted and reliable utility enables users to clean their calendar items like holidays with just few clicks. It maintains original holiday calendar data intact while eliminating redundant events. This software can also delete duplicate tasks in Outlook along with more items in mailbox. It is time to understand how this software works.

Working Guide to Remove Duplicate Holidays from Outlook Calendar

  1. Download and launch aforementioned software.
  2. run

  3. Click on Add Files or Folder feature for importing data files.
  4. add file

  5. This software offers dual mode to remove duplicates, i.e., Within and Across Folders.
  6. dual mode

  7. Set Location path to store resultant Outlook supported file.
  8. path

  9. Select Calendar option from item types to delete duplicate holidays on Outlook calendar.
  10. calendar

  11. In specific duplicate criteria, choose Holidays as filter.
  12. duplicate

  13. Finally, tap Ok button for completion of removal process.
  14. ok

#3: How to Delete Duplicate Holidays from Outlook Calendar on Mac OS

If macOS user is also facing this recurring issue, which is probably due to syncing error, then they can choose to follow these steps. Let’s look at these simple steps for Outlook on Mac.

  1. Open Outlook on Mac and click on its Calendar tab.
  2. Switch its default calendar view to List View.
  3. Search for repeated holidays.
  4. Choose duplicate Outlook holiday events.
  5. At last, remove all by pressing Delete button.

This enables Mac users to remove double holidays Outlook calendar easily.

#4: Remove Duplicate Holidays from Outlook Calendar on OWA

This method is for those who are using Outlook on Web (OWA) and want to delete duplicate holidays on Outlook calendar. Follow steps listed below:

  1. Launch Outlook on Web.
  2. Go to its Calendar section.
  3. Look for holidays using their names, dates, etc.
  4. Now, sort and open duplicated holidays from list.
  5. Lastly, manually delete unwanted holiday events.

As OWA does not offer any automated feature for elimination of duplicate holidays, users have to do it manually. Otherwise, try SysTools’ software to automate deletion process.

How to Remove Duplicate Public Holidays from Outlook Calendar?

Sometimes public holidays also get duplicated and appear in list. This is because of importing data files several times. To fix that, follow these steps.

Steps:

  1. Open Outlook.
  2. Navigate to File, then tap Options, and lastly press Calendar section.
  3. Choose Add Holidays feature.
  4. Uncheck already uploaded holiday area and remove existing ones.
  5. Finally, add Public Holidays only single time.

Note: This method is helpful for those who are continually searching for solutions to delete duplicate public holidays from Outlook calendar. This manual process might not be accurate and reliable for bulk deletion. In such scenario, use professional software by SysTools, which helps users in no time and give complete secure and 100% trusted output.

Tips to Prevent Repeated Holidays in Outlook Calendar

If one has deduplicated holidays, then it is suggested to follow these advanced practices to avoid duplicate holidays in future. Here are some listed below:

  • Do not try to import same calendar holiday multiple times.
  • Take backup of data files regularly.
  • Prevent syncing between same Outlook profile.
  • Always check for holiday settings before uploading same.
  • Choose aforementioned tool for better and more secure output.

Final Words

We concluded this article by saying that duplicate holidays of outlook calendar can easily clutter and make it disorganized. To fix that, we have covered all possible solutions to remove duplicate holidays from Outlook calendar, whether you are using Outlook on desktop, Mac, or Web. Someone is working on small dataset of duplicates, then they can use manual methods, while an advanced utility is recommended for large and complex duplicate calendars. If you have any more queries, kindly contact us via live chat. Here for you 24/7 support.

FAQs on Remove Double Holidays Outlook Calendar

Q.1 How Do I Delete Duplicate Holidays in Outlook Calendar?
A. One can open Outlook and look for duplicate holidays, choose them all, and clean them manually. Also, for faster results, opt for professional software.

Q.2 Can Outlook Automatically Remove Duplicate Holidays?
A. No, Outlook does not provide any built in removal feature that helps users to remove duplicate holidays from Outlook calendar.

Q.3 How to Remove Duplicate Public Holidays from Outlook Calendar?
A. Firstly, users have to delete already existing redundant holidays and upload holiday calendars again.

Q.4 How Do I Remove Duplicate Holidays from my Outlook Calendar?
A. To delete duplicate holidays from Outlook calendar:

  1. Switch Default calendar view to List view.
  2. Look for Repeated Holidays and delete them.
  3. Or use an expert certified software developed by SysTools for permanent deletion.
Google Preferred Source