Century Diary is a calm photo diary and personal journal for recording today and revisiting the same date across different years.

What was I like on this day each year?
What was I thinking one year ago today, five years ago today, or even longer ago?

Century Diary helps you view your diary entries from the same date across all years in one place.
As your daily records build up, they become a special way to look back on “you on this day” every year.

Main features

■ View past diaries from the same date
See your past entries written on the same date at a glance.
For example, on May 2, you can look back at your May 2 entries from different years and meet the person you were back then.

■ Write today’s diary
Record your thoughts and feelings freely without complicated formats.
You can write a short note or leave a detailed memory you want to keep for a long time.

■ Record your emotions
Add your mood to each diary entry and take a moment to reflect on how you felt that day.
When you revisit the same date in the future, you can remember not only what happened, but also how you felt.

■ Photo diary
Save memorable moments with photos.
Keep the atmosphere of the day, special places, and precious scenes together with your writing.

■ Shared diaries from around the world
Share your diary and discover everyday stories written by people around the world.
Through daily moments written in different countries and languages, you may find familiar emotions and new perspectives.

■ Comfortable design
With soft colors and a simple layout, Century Diary is designed to make writing feel easy and comfortable.
It offers a warm diary experience that makes you want to record a little bit every day.

Core features available for free

The core features of Century Diary are available for free.
You can write today’s diary, record emotions, add photos, and revisit past diaries from the same date without a subscription.

To protect the calm and emotional experience of writing, Century Diary does not include ads.
Your diary time should remain a quiet and comfortable space.

AI features that enrich your experience with a subscription

Century Diary offers various AI-powered features through a subscription.

AI can leave warm comments on your diary, and semantic search helps you find past entries based on meaning rather than simple keywords.
You can also read diaries shared by people around the world through AI translation, making stories written in different languages feel more natural and accessible.

AI features are designed not only to add convenience, but also to help you reflect more deeply on your own records and feel closer to other people’s stories.
We will continue developing AI-powered features that make the diary experience richer and more meaningful.

Recommended for people who want to

- Record their thoughts and feelings, even briefly
- Look back on themselves from one year ago, five years ago, or earlier
- Gather memories from the same date across different years
- Save each day with photos
- Discover the daily lives and emotions of people around the world
- Enjoy a richer diary experience with AI comments, semantic search, and translation
- Use a calm, emotional diary app without ads

Even an ordinary day becomes a precious record that you can never experience again in the same way.
Leave today with Century Diary, and meet your past self again when this date returns someday.