Calendarium Downloads & RevenueCalendarium - About this Day · App Store
Not in any tracked top chart right now.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperPiotr Knapczyk
CategoryReference
PriceFree
Released
Rating★ 4.0 (27)
Version1.8.4
Age rating4+
First seen by us
24 Oct 2026
24 Oct 2026Calendarium - About this Day update history & changes
Last change · 3 events since 29 Nov 2011Full timeline ↓Full timeline · 2 events in the last 12 months
- 🆕Calendarium - About this Day first spotted by AppInsiderFrance (found via developer)
- 🆕Calendarium - About this Day released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.0 ★
27 ratings
Measured
Calendarium - About this Day on the App Store
App details
App ID
482136387
Publisher
Piotr Knapczyk
On the store since
Nov 2011
14 years on the store
Minimum OS
iOS 9.0+
iPhone 4s and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
4
EN JA PL ES
Size
57 MB
Also listed in
Education
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.0 ★
27 ratings
Measured
Ratings
27
Measured
About Calendarium - About this Day
Calendarium is new, easy to use calendar which gives you a new way to discover many interesting things about this day.
Calendarium combines calendar of historical events with times of sunrise/sunset, number of week, day, day length, moon phase and more.
–– What our users think ––
" Fascinating!" – Snaarl
"It is a great way to see the history of the day. I always learn something new." - Nancy Rohe
"Use this app every day! Fun to learn new info from a wide time range of history." - M1d2i3v4
"This is a trivia nerd's Nirvana, and a history buff's Beulah! Bravo! to the developers of this app!" – jmhillpresley
––––––
• #1 App in 3 Countries
• #1 Reference App in 40 Countries
• Over half million downloads
––––––
Features:
• On this day in history - Discover historical events and holidays and share it with your friends via mail, Twitter, Facebook or text message
• Sunrise and sunset time
• Planets View - Shows how all planets of solar system are aligned right now
• Week number, day number, weekday and year
• Number of days passed from 1 Jan and days left until 31 Dec
• Moon phase
• Day length
• Geographic coordinates
• No Internet connection required
-- Calendarium uses your location only to provide accurate information about sunrise, sunset times and length of the day. We do not store it in any way. Disabling location settings will disable only these features --
Calendarium combines calendar of historical events with times of sunrise/sunset, number of week, day, day length, moon phase and more.
–– What our users think ––
" Fascinating!" – Snaarl
"It is a great way to see the history of the day. I always learn something new." - Nancy Rohe
"Use this app every day! Fun to learn new info from a wide time range of history." - M1d2i3v4
"This is a trivia nerd's Nirvana, and a history buff's Beulah! Bravo! to the developers of this app!" – jmhillpresley
––––––
• #1 App in 3 Countries
• #1 Reference App in 40 Countries
• Over half million downloads
––––––
Features:
• On this day in history - Discover historical events and holidays and share it with your friends via mail, Twitter, Facebook or text message
• Sunrise and sunset time
• Planets View - Shows how all planets of solar system are aligned right now
• Week number, day number, weekday and year
• Number of days passed from 1 Jan and days left until 31 Dec
• Moon phase
• Day length
• Geographic coordinates
• No Internet connection required
-- Calendarium uses your location only to provide accurate information about sunrise, sunset times and length of the day. We do not store it in any way. Disabling location settings will disable only these features --
Latest updates
1.8.4
- Fixed issue with Today widget background Color
