All onevikash tools

Calculators, countdowns, timers, calendars and festivals

• Age calculator

  Enter a date of birth and an as-of date to calculate calendar age without sharing personal information.

• Birthday calculator

  See the next birthday date, weekday, countdown in days and the age reached on that date.

• Anniversary calculator

  Use any starting date to find the next annual anniversary and how many years it marks.

• Age difference

  Compare two birth dates without names, accounts or shareable personal-data links.

• Date difference

  Measure a date range as calendar years, months and days or as an exact total number of days.

• Add or subtract dates

  Choose a starting date, amount and calendar unit to get a dependable resulting date.

• Working days

  Count weekdays in a range with a clear breakdown of included workdays and weekend days.

• Day of the week

  Enter any date to see its weekday and useful calendar-position details instantly.

• Create a countdown

  Create a private or shareable countdown for any date, time and timezone.

• Birthday countdown

  Create a private birthday countdown and share it only when you choose.

• Wedding countdown

  Count down to a wedding in its exact event timezone.

• Anniversary countdown

  Create a focused countdown to an upcoming anniversary.

• Exam countdown

  Set an exact exam date, time and timezone.

• Public countdowns

  Discover moderated public countdowns, wishes and community moments. Working beta.

• Online timer

  A calm, accurate timer for focus, study, cooking, workouts and everything in between.

• Custom timer

  Enter the exact duration you need, then start one clear countdown with the same reliable controls as every preset.

• 5 minute timer

  A ready-set five minute timer for the small task you can finish before momentum disappears.

• 10 minute timer

  Long enough to make visible progress, short enough to start without negotiating with yourself.

• 15 minute timer

  Use a quarter hour when five feels rushed and thirty feels too large to begin.

• 20 minute timer

  A ready-to-start twenty minute timer with pause, reset, add-time, sound and fullscreen controls.

• 25 minute timer

  Use a standalone twenty-five minute countdown when you want a focus block without an automatic break cycle.

• 30 minute timer

  A simple half-hour boundary for work that deserves more than a quick sprint.

• 1 hour timer

  Give a substantial task a clear beginning, a visible finish and fewer reasons to check the clock.

• 45 minute timer

  A clear forty-five minute boundary for a lesson, focused project block, workout or study session.

• Study timer

  A 25-minute focus and five-minute break rhythm that makes the next study session feel manageable.

• Pomodoro timer

  Move between twenty-five minutes of focused work and a deliberate five-minute break.

• Classroom timer

  Set a shared activity length, then use the large display and fullscreen controls from anywhere in the room.

• Interval timer

  Choose work, rest and round lengths, then follow an accurate repeating clock with clear phase changes.

• Stopwatch

  Start instantly, record lap splits and keep elapsed time clear to one hundredth of a second.

• Fullscreen timer

  Set any duration, then make the clock the only thing on screen for a class, workout, meeting or shared task.

• Calendar 2026

  Browse a global year calendar with major festivals and regional overlays.

• Calendar today

  See today in your local timezone and the next verified dates.

• India calendar 2026

  Open the India regional calendar overlay for 2026.

• United Kingdom calendar 2026

  Open the UK regional calendar overlay for 2026.

• United States calendar 2026

  Open the US regional calendar overlay for 2026.

• World festivals

  Discover one canonical page per festival with verified local date variants.

• Festival calendar 2026

  Browse verified worldwide festivals in chronological order.