Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Day of the Week Calculator

Given any calendar date in YYYY-MM-DD form, return the day of the week (Monday through Sunday). Handles historical dates back to 1900 and forward through the century.

Date (YYYY-MM-DD)

Fill in the required fields to see your result.

Time Zones

International Meeting Time Planner

Score any proposed meeting time based on how well it falls within business hours for your organiser and two participants across different time zones. Use it to find a window that works for everyone without spreadsheet guesswork.

Proposed Meeting Time (h)

Organiser Time Zone

Participant 1 Time Zone

Participant 2 Time Zone

Business Hours Priority

Fill in the required fields to see your result.

Key differences

	Day of the Week Calculator	International Meeting Time Planner
Category	Time Zones	Time Zones
Inputs required	1	5
Result	Day of the Week	Meeting Suitability Score (%)
What it does	Given any calendar date in YYYY-MM-DD form, return the day of the week (Monday through Sunday). Handles historical dates back to 1900 and forward through the century.	Score any proposed meeting time based on how well it falls within business hours for your organiser and two participants across different time zones. Use it to find a window that works for everyone without spreadsheet guesswork.