Date & Time
Date & Time tools on UniTools: age calculator, days between dates and more.
The calendar half: age in years and in days, differences between dates, date offsets, duration between moments, hours worked, and a countdown that separates calendar days from working ones.
The reference half answers the questions where the rule matters: what day of the week a date was and its ISO week number, whether a year is a leap year, zodiac and Chinese calendar signs, how many days remain under the Schengen 90/180 rule, and how long jet lag takes to clear.
Tools in this category
Time Zone Converter, World Clock, and Meeting Planner
Convert time between cities and see several of them at once on a shared timeline, with daylight saving handled from real IANA rules. Built for scheduling calls.
Age Calculator
Work out an exact age from a date of birth, including leap years. Also shows total days lived and the next birthday.
Date Difference Calculator
Count the days between two dates, with or without the end date, broken down into calendar months and days, weeks and weekdays.
Date Calculator
Find the date a set number of days, weeks or months away. For deadlines, delivery estimates and notice periods.
Time Calculator
Add or subtract durations in hours and minutes without decimal confusion. Because 1.5 hours is 1:30, not 1:50.
Time Difference Calculator
Measure the exact span between two moments, down to minutes. For shifts, downtime reports and elapsed-time questions.
Hours Worked Calculator
Enter start and end times, subtract the break, and get hours worked in both clock and decimal form for payroll.
Working Days Between Dates
Counts working days between two dates, leaving out weekends and, if you choose, Russian public holidays and transferred days off for 2026, with shortened pre-holiday days and working hours.
Week Number Calculator
Find the ISO week number for a date, along with the day of the year, the quarter and the weekday.
Days Until a Date
Days, weeks and months until an event, or since it, if the date has already passed.
Schengen 90/180 Calculator
Works out how many Schengen days remain under the 90/180 rule and whether a planned trip fits inside them.
Jet Lag Calculator
Estimates how many days adjusting to a new time zone takes and suggests how to prepare for the flight in advance.
Day of the Week Calculator
Gives the day of the week for any date, along with the ISO week number, the day of the year and the quarter.
Leap Year Calculator
Checks whether a year is a leap year, finds the nearest leap years either side, and counts how many fall in a given range.
Zodiac Sign Calculator
Gives the zodiac sign from a fixed table of dates, with its element and the boundaries the calculator uses.
Chinese Zodiac Calculator
The animal of any year in the Chinese calendar, with its element and colour, the exact dates the year begins and ends, and the years of the same animal.
Age in Days Calculator
Find out how many days you have been alive — plus hours, weeks and months, the day of the week you were born, and when your next round thousand days lands.
Time Until Calculator
Works out how many days, weeks and working days remain until a date, and counts backwards for dates that have passed.
Related categories
FAQs
What scenarios does this category cover?
Age in years and in days, date differences, date offsets, day of the week, leap years, hours worked, countdowns, the Schengen 90/180 rule, jet lag, zodiac signs and time zones.
Is there a tool for shifts and breaks?
Yes. The category includes an hours-worked calculator with break input.
Can I calculate duration between two datetimes?
Yes. There is a separate tool for datetime duration.
Does each calculator have its own page?
Yes. Each tool has a dedicated route and metadata.