Weekday Calculator

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Date

Notable Dates & Shortcuts

Century 2000 anchor is Tuesday (2). Computed Doomsday for 2026 leads to Wednesday.

Day of the Week

Wednesday

Weekday Common Year Autumn / Fall 🍂

Day of the Year

Day 308 of 365

Days Remaining in Year

57 days left

ISO-8601 Week Number

Week 45

Zodiac Sun Sign

Scorpio ♏

Select any calendar date: Pick your birth date, historical event date, or upcoming appointment date using the date picker or quick presets.
Instantly view day of the week: See whether the date is Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday.
Explore calendar trivia & proof: Discover day of the year, ISO week number, zodiac sign, leap year status, and John Conway's Doomsday rule proof.

ClickBasic tools run 100% securely with zero installation, no registration, and no limits.

Day of the Week Finder: Find what day of the week you were born on or verify any past or future historical date.

Doomsday Rule Verification: Features mental-math algorithm proof based on John Conway's famous Doomsday calendar rule.

Rich Calendar Statistics: Displays day of year, days remaining, ISO-8601 week number, zodiac sign, and year progress percentage.

100% In-Browser & Private: Calculates date math instantly on your device without transmitting data anywhere.

Select your birth date in the date input above, and ClickBasic will instantly display the exact day of the week you were born on.

It computes the day of the week using Zeller’s Congruence and John Conway’s Doomsday Rule, accounting for leap years and Gregorian calendar shifts.

Yes, you can calculate the day of the week for any Gregorian calendar date including notable historical milestones.

ISO-8601 is the international standard where weeks begin on Monday and week 1 is the week with the year's first Thursday.