MB Misdate BureauEvidence before intuition
Temporal integrity division · established 2026

Spot what does not belong in the past.

Misdate Bureau is a free history deduction game for players who enjoy spotting what does not belong. Each case is a room staged in one year that hides three objects which arrived too early. Inspect the objects, flag the three mismatches, and defend each flag with evidence. Twelve cases and a daily desk are included.

Each case is a room staged in one year, from a telegraph office to a fifties kitchen. The bureau wants evidence, not hunches: every flag you file needs a reason that holds up.

Free, no account. Your cases are kept in this browser.

Extra challenge settings
Your progress & daily archive
Your local credentials

Evidence leaves a trail.

Master each file, improve clean reports, and revisit the deterministic daily archive. No account required.

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Field manual

Suspicion is cheap. Evidence is not.

  1. Read each object card. It says what the object is and how it is staged, never when it was made.
  2. Use Inspect construction to see the material and the process, power source, or network the object needs.
  3. Flag exactly three likely anachronisms, then file the report and defend each one.
  4. False flags and unsupported reasoning reduce credibility; the room stays open until all three are documented.

The closing report is where the dates live: it names each anachronism, its evidence basis, and when the object actually appeared.

Keyboard and touch use the same object buttons, and the shortcut list is on the docket home. Calm mode removes time pressure from scoring.
Bureau preferences

Desk settings

This game

Your files remain in this browser. This site counts page visits through Cloudflare: it sets no cookie, it cannot follow you from here to another site, and nothing from your play is part of the count.
Bench inspection

Visible record
Construction
Required system
Evidence report

Defend each flag.

Choose the strongest basis for each accusation. A correct object with unsupported reasoning will be returned for revision.
Desk shortcuts

Keyboard shortcuts

Tab and Enter
Move between object cards and activate one
1 to 9, 0
Flag or unflag the object in that position
I
Inspect the object that currently has focus
P
Pause or resume; the room is covered while paused
C
Request the next date clue
Enter
File the report once three objects are flagged
Escape
Return to the docket; the draft is kept
?
Open this list from anywhere in the game

Shortcuts are ignored while you are typing in a field or while a dialog is open.
Twenty-eight-day desk archive

Dated case files

Every date deterministically selects and shuffles a case. The global day resets at midnight Eastern Time. Your best credibility is stored locally.
Campaign mastery

Investigator credentials

Case record

Merit stamps