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.