Date Time Tools
Utilities for date formatting, time conversion, and calculations.
Accounts Receivable Aging Date Calculator
Projects accounts receivable aging date from the values entered to sup...
Add Working Hours Calculator
Add a specified number of working hours to a starting date/time while ...
Add Business Days Calculator
Add a specified number of business days (workdays) to a starting date....
Chronological Date Sorter
Sort a list of dates into chronological order, from oldest to newest o...
Year Calendar Text Generator
Produces a complete year calendar in plain text showing all 12 months ...
Date Range to Weekdays List
Lists all business weekdays (Monday through Friday) within a specified...
Week Start and End Date Finder
Finds the start and end dates of the week containing a specified date....
Month Calendar Text Generator
Generates a plain-text grid calendar representation for any month and ...
Date Range Generator
Generates a complete list of calendar dates within a specified start a...
Recurring Date List Generator
Generates a list of recurring dates based on an interval and pattern b...
Time Zone Offset List Generator
Compiles structured datasets of global timezone names, offsets, and in...
ISO 8601 Date Formatter
Format any date into ISO-8601 standards, including calendar dates, wee...
Week Number Calculator
Calculate the ISO-8601 week number, starting Monday, and ending Sunday...
Pregnancy Due Date Calculator
Estimate a pregnancy due date based on the Last Menstrual Period date ...
Sunrise Sunset Time Estimator
Estimate sunrise and sunset times for any date and geographic coordina...
Season Detector
Determine the meteorological and astronomical season for any given dat...
Quarter of Year Calculator
Determine which calendar quarter a given date belongs to, along with s...
Leap Year Checker
Determine whether a given year is a leap year according to the Gregori...
Day of Week Finder
Determine the day of the week for any calendar date....
Moon Phase Calculator
Determine the approximate moon phase and illumination percentage for a...
Contract End Date Calculator
Determine a contract expiration date by adding a duration to a start d...
Business Days Calculator
Calculate the exact number of business days (workdays) between two dat...
Time to Decimal Hours Converter
Convert time in HH:MM:SS format to decimal hours and vice versa....
Chinese Calendar Converter
Convert Gregorian dates to the traditional Chinese lunisolar calendar,...
Decimal Hours to Time Converter
Convert decimal hour values (e.g., 2.75 hours) back into HH:MM:SS or H...
Hebrew Calendar Converter
Convert dates between the Gregorian calendar and the Hebrew (Jewish) l...
Islamic Hijri Calendar Converter
Convert dates between the Gregorian and Islamic Hijri (Hijrī) lunar ca...
Date Format Converter
Convert dates between any combination of common date formats: MM/DD/YY...
Persian Solar Hijri Calendar Converter
Convert dates between the Gregorian calendar and the Persian Solar Hij...
Julian Date Converter
Convert between Gregorian calendar dates and astronomical Julian Day N...
Date to Unix Timestamp Converter
Convert calendar dates and times to Unix epoch timestamps in seconds a...
UTC to Local Time Converter
Convert a UTC date and time to the local time in any specified IANA ti...
Unix Timestamp to Date Converter
Convert a Unix timestamp (seconds or milliseconds) to a human-readable...
Time Zone Converter
Convert a specific date and time from one time zone to another, taking...
Local Time to UTC Converter
Convert a local timezone-specific date and time into its Coordinated U...
Human Readable Duration Formatter
Convert numeric durations (seconds, minutes, hours, days) into structu...
Relative Time Formatter
Convert a date/time into a human-readable relative expression such as ...
Cron Expression to Plain English
Convert a cron expression (e.g., '0 9 * * 1-5') into a plain English d...
Age in Various Units Calculator
Convert a birthdate into age expressed in multiple units simultaneousl...
24-Hour to 12-Hour Converter
Convert 24-hour (military) time notation to 12-hour AM/PM format. Corr...
12-Hour to 24-Hour Converter
Convert 12-hour AM/PM clock time notation to 24-hour (military) format...
Time Duration Calculator
Compute the difference between two clock times (HH:MM:SS format) and r...
Date Validation Tool
Check whether a given date string represents a real calendar date. Val...
Day of Year Calculator
Calculate which day of the year a given date falls on (1–366). For exa...
Daylight Hours Calculator
Calculate total daylight hours, sunrise/sunset times, and solar geomet...
Days Between Two Dates
Calculate exact days, business days, and weekends between two dates. G...
Easter Date Calculator
Calculate Easter Sunday for any year using the Computus algorithm. Der...
Invoice Due Date Calculator
Calculate invoice payment deadlines from invoice date and payment term...
Fiscal Year Calculator
Map any calendar date to its fiscal year, quarter, and period based on...
Countdown Formatter
Calculate the exact time remaining or elapsed between now and any targ...
Cron Expression Generator
Build a valid cron expression by selecting schedule parameters (minute...
Date Calculator
Add or subtract a specified number of days, weeks, months, or years fr...