Calendarium - About this Day
Calendarium - About this Day Summary
Calendarium - About this Day is a mobile iOS app in Books And Reference by Piotr Knapczyk. Released in Nov 2011 (14 years ago). It has 2.6K ratings with a 4.68★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 9.9K monthly active users . Store metadata: updated Apr 4, 2020.
Recent activity: 3.00 new ratings this week View trends →
Data tracking: SDKs and third-party integrations were last analyzed on Apr 22, 2025.
Store info: Last updated on App Store on Apr 4, 2020 .
4.68★
Ratings: 2.6K
Screenshots
App Description
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
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• #1 App in 3 Countries
• #1 Reference App in 40 Countries
• Over half million downloads
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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 --