|Number of days in a year|
|Total time calculator|
This calculator is useful for fast time addition, you just enter time entries in hh mm ss format and the calculator gives you the sum of there time entries
|Day of the week for a given date|
This online calculator shows the day of the week for a given date
|How many days are there between two dates?|
This day calculator counts the number of days between two dates. It does not include the last day, so, there is 1 day between today and tomorrow, not 2.
|Sunrise and sunset calculator|
Sunrise/Sunset calculation for given latitude and longitude or for given city. Source: Almanac for Computers, 1990 published by Nautical Almanac Office United States Naval ObservatoryWashington, DC 20392
|Azimuth and solar elevation angle|
Calculation of azimuth and solar elevation angle by given the coordinates and time of observation. It's possible to input coordinates manually or by selecting from the directory of cities.
|Date plus days|
This online calculator adds or subtracts a given number of days to or from a given date.
|City Timezone Converter|
This calculator allows you to quickly and easily find out the current time in any city in the world and the time difference between two cities.
|Julian days calculation|
Calculation of the Julian day for a given date, plus some information.
|Julian and Gregorian calendars|
Julian and Gregorian calendars date conversion
|Old Russian (Byzantine) system of chronology|
Old Russian calendar - Years are counted since the creation of the world
Moon's age and phase calculation
|The Muslim calendar. The Gregorian calendar conversion|
The Muslim calendar. The Gregorian calendar conversion
|Mayan calendar, 2012, the end of the world.|
About 2012, the end of the world and Maya
|Russian non-working days|
The calculator displays official day offs for the current year and the weekends adjacent to them. The calculator takes into account weekends shifts according to Russian Federation Government Decrees.
|Activity Time Summarizer|
This calculator is designed to summarize and total time for different activities entered into a table.
|Time Span Calculator|
This online calculator computes how much time is passed between two time points, specified in hours and minutes. But, unlike others, it computes several values - including time span over midnight.
|World Time Converter|
The calculator displays the current time on your PC, as well as the corresponding UTC time based on the time zone on your PC. Additionally, the user can choose any city and the calculator will display the current time in that city.
|Date and number of working days (for Russia)|
Calculator calculates the date of the initial date and the number of working days. Taking into account weekends, holidays and weekend shifts at work days, according to the published decrees of the government of the Russian Federation. Created by user's request.
|Number of working days between two dates (for Russia)|
Calculator calculates the number of days between the two entered dates. Taking into account weekends, holidays and weekend shifts to work days, according to the published decrees of the government of the Russian Federation.