# CalendarDuo — View Holidays of 2 Countries

> Dual-country holiday calendar with world clock and currency exchange. (iPhone/iPad app by Chun Lam.)

- Source: https://appshunter.io/ios/app/calendarduo/id1589593639 (this page in markdown: same URL + `.md`)
- Developer: [Chun Lam](https://appshunter.io/developer/1565498900)
- Category: Utilities, Travel
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 41 MB
- Languages: English
- Released: 2021-11-03
- Data updated: 2026-06-24
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/calendarduo/id1589593639/reviews.md

## What is CalendarDuo?

** This app does not access your Contact List or Calendar. **

CalendarDuo allows users to switch between two calendars at their fingertips! 

CalendarDuo is the best tool for:

- Frequent flyer between two countries/regions
- Organizing events with family members or relatives overseas
- Scheduling meetings and tasks with colleagues overseas
- Planning trips to another country/region
- ANYONE who needs a simple calendar!

Top features

- Switching between TWO world calendars INSTANTLY
- Duo-view displaying ONE calendar with holidays of TWO countries/regions
- User interface with multiple language selection
- Daylight Saving Time (DST) dates
- Currency exchange rate (for currencies available in Europe Central Bank)
- World clock
- Adding notes

CalendarDuo is the simplest calendar you’ll ever need! 

NEW! 2026 holidays are available now! 

- public holidays
- bank holidays
- statutory holidays
- regional holidays
- provincial holidays
- special days

NEW! 2022 World Calendars (more are coming!):

- Australia
- Canada
- China (PRC)
- France
- Germany
- Hong Kong
- India (Maharashtra, New Delhi)
- Indonesia
- Italy
- Japan
- Macau
- Malaysia
- Philippines
- Portugal
- Singapore
- South Korea
- Taiwan
- Thailand
- United Kingdom
- United States
- Vatican City

Holiday information is gathered from government official releases. Source details can be found on each Holiday List.

## Key features

- Switch between two world calendars instantly
- Duo-view with holidays from two countries
- Daylight Saving Time dates
- Currency exchange rate
- World clock
- Add notes

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/calendarduo/id1589593639/reviews.md

### 1/5 — 沒有更新

*2024-07-16, version 1.0.4*

2024年開始，台灣地區的國定假日就再也沒有更新過，離間什麼都沒有

### 2/5 — Please update public holiday for other countries

*2024-02-15, version 1.0.4*

Please update public holiday for other countries

### 5/5 — Need update for 2024 PH

*2024-01-07, version 1.0.4*

請問可否更新2024年其他地方的公眾假期等資訊

### 3/5 — Switch to other country

*2023-08-08, version 1.0.4*

How to switch to UK calendar ?

### 5/5 — Easy to use!

*2022-08-23, version 1.0.4*

It’s show the time and the holidays with two countries. It’s very useful.

### 5/5 — Useful and simple

*2021-11-04, version 1.0*

I can easily switch the calendars between two countries. Useful!

## Frequently asked questions about CalendarDuo

### Does CalendarDuo access my contacts or calendar?

No, CalendarDuo explicitly states that it does not access your contact list or calendar. This ensures your personal data remains private and separate from the app's functionality.

### How does CalendarDuo display holidays from two countries?

CalendarDuo offers a 'Duo-view' which displays holidays from two selected countries or regions on a single calendar. You can also instantly switch between individual country calendars.

### What countries' holidays are available in CalendarDuo?

CalendarDuo supports a wide range of countries including Australia, Canada, China, France, Germany, India, Italy, Japan, the UK, and the US, among many others. New holiday data for 2026 is already available.

### Does CalendarDuo include Daylight Saving Time information?

Yes, CalendarDuo includes information on Daylight Saving Time (DST) dates, which is crucial for accurate scheduling across different regions.

### Can I see currency exchange rates with CalendarDuo?

Yes, CalendarDuo provides currency exchange rates for currencies available from the European Central Bank, adding a useful financial tool for international users.

### What languages does CalendarDuo support?

CalendarDuo features a user interface with multiple language selections, making it accessible to a global audience.

### Does CalendarDuo have ads?

Yes, CalendarDuo contains advertisements. As it is a free application, ads are used to support its development and maintenance.

### How often is CalendarDuo updated?

CalendarDuo was last updated on May 28, 2026, with version 1.3.1. The app also provides holiday information for future years, such as 2026, indicating regular updates for holiday data.

## Version history (last 5 releases)

### 1.3.1 — 2026-05-28

Updated 2026 Holidays for:
- Australia
- Hong Kong
- Canada
- China
- Indonesia
- Japan
- Macau
- Philippines
- Taiwan
- UK
- USA

### 1.0.4 — 2022-08-15

+ 2023 public holidays for Hong Kong, Indonesia, Macau, Taiwan, UK, US

### 1.0.3 — 2022-01-07

+ Tap clock to switch between Local time and capital time of the selected country
+ Reduced app size

### 1.0.1 — 2021-11-20

- UI Update

### 1.0 — 2021-11-04

No release notes.

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| --- | --- | --- | --- |
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## More apps by Chun Lam

- [學車筆試 2026年版](https://appshunter.io/ios/app/2026/id1565498898)
- [QR Code Reader by Scanwise](https://appshunter.io/ios/app/qr-code-reader-by-scanwise/id1580909740)
- [台灣駕照筆試100分 - 2026年版 (附詳解)](https://appshunter.io/ios/app/100-2026/id1582763135)
- [香港人！Life in the UK Test for HK](https://appshunter.io/ios/app/life-in-the-uk-test-for-hk/id1633917240)

All apps by Chun Lam: https://appshunter.io/developer/1565498900

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-24.*