Free online tools to help you plan, calculate, and organize your time more effectively.
Calculate the number of days between two dates or add/subtract days from a date.
Try it now →🎂Calculate your exact age in years, months, and days. Discover your zodiac sign.
Try it now →💼Calculate working days, weekends, and public holidays for any country and year.
Try it now →✅Create and print custom checklists. Choose from templates or build your own.
Try it now →🌙Track moon phases throughout the year. Full moon and new moon dates at a glance.
Try it now →🏫Academic year schedule with term dates, school holidays, and exam periods.
Try it now →🌍Instantly convert times between any time zones and cities worldwide with DST support.
Try it now →🕐See the current time in 24+ major cities worldwide with live second-by-second updates.
Try it now →🍅Boost productivity with the proven Pomodoro Technique. Customizable work and break intervals.
Try it now →⏱️Precise stopwatch with lap times and a customizable countdown timer for any purpose.
Try it now →⏳Calculate exact hours, minutes, and seconds between two times. Perfect for timesheets.
Try it now →🤝Find the best meeting time across multiple time zones with visual overlap analysis.
Try it now →📆Find what day of the week any date falls on. Discover your birthday weekday.
Try it now →🔄Check if any year is a leap year. See upcoming leap years and learn the rules.
Try it now →🗓️Convert dates between Gregorian, Julian, Islamic (Hijri), and Hebrew calendars.
Try it now →🌅Calculate sunrise, sunset times, and day length for any location on Earth.
Try it now →📊Track daily habits, build streaks, and visualize your progress with a printable grid.
Try it now →🎯Set SMART goals, break them into action steps, and track progress toward achievement.
Try it now →💰Convert salary between hourly, daily, weekly, monthly, and annual rates instantly.
Try it now →🏖️Maximize your PTO by strategically planning around weekends and public holidays.
Try it now →🔮Discover palindrome dates, sequential patterns, and other fascinating date curiosities.
Try it now →Yes, all tools on BaseCalendar are 100% free. No registration, no hidden fees. Use them as many times as you want.
No installation needed. All tools run directly in your browser on any device — desktop, tablet, or phone.
Yes! Most tools include a print-friendly option. Checklists, calendars, and planners can all be downloaded as PDF or printed directly.
Last updated: February 12, 2026