Calendar : 4500 BC to 4500 AD

Calculate the day of the week

$2.99 · Designed for iPad

Calculate the day of the week for any date ! From 4,500 B.C. to 4,500 A.D. ! 9000+ years ! Shows the Moon phases and positions of planets ! • Features in 30 calendar languages Sunday, May 20, 2018 English (Sunday, May 20, 2018) Chinese (公元2018年5月20日星期天) Korean (2018년5월20일 일요일) Japanese (平成30年5月20日 日曜日) Dutch (Zondag 20 mei, 2018) German (Sonntag 20 Mai, 2018) Russian (Воскресенье 20 мая, 2018) French (le dimanche 20 mai, 2018) Swedish (Söndag 20 maj, 2018) Turkish (Pazar, 20 Mayıs, 2018) Icelandic (Sunnudagur, 20 maí, 2018) Danish (Søndag, 20 maj, 2018) Spanish (Domingo 20 mayo, 2018) Norwegian (Søndag, 20 mai, 2018) Hindi (रविवार, 20 मई, 2018) Ukrainian (Неділя, 20 травня, 2018) Tamil (Ñāyiṟu, mē 20, 2018) Malay (Ahad, 20 Mei, 2018) Portuguese (Domingo, 20 mai, 2018) Czech (Neděle, 20 května, 2018) Slovak (Nedeľa, 20 máj, 2018) Hungarian (2018, május 20, vasárnap) Serbian (Недеља, 20 маја, 2018) Romanian (Duminică, 20 mai, 2018) Macedonian (Недела, 20 мај, 2018) Laotian (2018 phudsapha 20 vnoathid) Latvian (Svētdiena, 20 maija, 2018) Polish (Niedziela, 20 maja, 2018) Croatian (Nedjelja, 20 svibnja, 2018) Indonesian (Minggu, 20 Mei, 2018) You can switch between 30 languages instantly within the app. • Julian Date (JD) The day starts at noon on Monday January 1, 4713 B.C. For example, the Julian Date for 00:30 UT January 1, 2013, is 2456293.52 Days. • Islamic Calendar It is the lunar calendar also known as the Hijri calendar. Due to the fact that the Islamic calendar relies on certain variable methods of observation, it varies by different persons, rather than actual astronomical calculations. • Chinese Calendar (农历) It is a Lunisolar calendar, has been used by Chinese for thousands of years. For example, the date 22:30 May 20, 2018, it is 农历戊戌(狗)年四月初六 or 戊戌年 丁巳月 壬子日 辛亥时. • Korean Calendar (음력) The traditional Korean calendar, is still used to determine the Lunar New Year (설날) and the Mid-Autumn Day (추석) by the Korean people. It is similar to the Chinese calendar. • 3D Solar System and Earth-Moon System Super easy to navigate and to find where the planets are at any time between 4500 B.C. to 4500 A.D. • Week starts with Sunday or Monday 2 modes: Mon Tue Wed Thu Fri Sat Sun or Sun Mon Tue Wed Thu Fri Sat • Day Count (unit:days, months, years) For example, May 20, 2018 minus May 20, 1990 equals 10958 (Days) or 30 (Years) or 360 (Months) • Julian Calendar Useful for history study. For example, the October Revolution occurred on 25 October, 1917 in Russia. At that time, Russians were using the Julian calendar. In the Gregorian calendar, it is on 7 November, 1917.

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Built with iOS SDK 18.

The developer, 俊 姜, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

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    The developer has not yet indicated which accessibility features this app supports. Learn More

    • Seller
      • 俊 姜
    • Size
      • 6.6 MB
    • Category
      • Utilities
    • Compatibility
      Requires iOS 15.6 or later.
      • iPhone
        Requires iOS 15.6 or later.
      • iPad
        Requires iPadOS 15.6 or later.
      • iPod touch
        Requires iOS 15.6 or later.
      • Mac
        Requires macOS 12.5 or later and a Mac with Apple M1 chip or later.
      • Apple Vision
        Requires visionOS 1.0 or later.
    • Languages
      • English
    • Age Classification
      4+
    • Copyright
      • © 2025 Jun Jiang