Calendar : 4500 BC to 4500 AD

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.