# Chronology software for legal, research and incident timelines

Build a chronology where every event cites its evidence, dates can count from a T-zero, and every change is reviewed and recorded. The timeline below counts a Falcon 9 launch from liftoff, from the countdown to the satellites deploying.

## Evidence cited, not just listed

Keep each exhibit, statement or log in one source library and cite it from every event it supports. A reader sees the evidence under the fact.

- Books, articles, archives, web pages and media, each with the right fields.
- Add a source once, cite it from as many items as you like.
- Give the timeline assistant a PDF, a spreadsheet or a pile of scans and it drafts the events it finds, each with the quote it rests on. Nothing is added until you have reviewed it.

## Time counted from T-zero

Date an incident from the moment it began: T minus 38 minutes, T plus 2 minutes 13 seconds. Where the evidence is vague, say so, and the date keeps its margin.

- Count from a moment of your own and name it; every date reads from it, in seconds, minutes, days or years.
- Add a ± where a time is only roughly established, and the edge of its bar softens on the axis.
- Write a date in the calendar a source uses, and let every reader see it in theirs.

[How it works](https://timescrolly.com/help/dates)

## Colleagues with the right access

Invite people as viewers or editors, or let a team own the chronology, so the work goes on beyond one person's account.

- Editors add and change items; viewers read.
- Hand a timeline over to someone else, or to a team.
- Discuss the timeline, or any one item, right beside it. The discussion stays private, even on a public timeline.

**Pro & Team** Collaborators come with Pro and Team, and a team with the Team plan.

[How it works](https://timescrolly.com/help/collaborators)

## Review before anything changes

Viewers you invite can suggest an edit: a corrected date, a new event or a removal, with a note. An editor reviews each one, and nothing changes until it is accepted.

- A reviewer suggests an edit and says why.
- Editors tick what to accept and can leave a note for the suggester. Nothing is overwritten silently.
- Accepted edits land as the editor's own in the change history, and can be undone.

**Pro & Team** Letting viewers suggest edits comes with Pro and Team.

[How it works](https://timescrolly.com/help/suggested-edits)

## An audit trail you don't have to keep

Every edit is recorded: who changed what, with the values before and after.

- Filter by person, field or item.
- Undo an edit straight from its line in the change history.
- Deleted items and timelines can be restored for a while.

**Pro & Team** Pro and Team reach much further back through the change history than Free.

[How it works](https://timescrolly.com/help/deleted-and-restore)

## A booklet to file or hand in

Turn the chronology into a PDF to read, print or hand in, or a Word file to keep writing in, with every sourced item in date order.

- Choose what goes in, from a full booklet to a compact list of items.
- On A4 or US Letter, in any of six languages.
- As a Word file, the sources come through as notes that renumber as you edit.

**Pro & Team** Exporting a booklet comes with Pro and Team, and also when you edit a timeline whose owner has one.

[How it works](https://timescrolly.com/help/printing-and-images)

## Coming from a spreadsheet or a document?

A spreadsheet of dates is the usual chronology, and its weakness is always the same: the evidence sits in another column or another file. Here each event carries its citation.

A document with a table has no memory of itself. When a time changes, you can't say who changed it or when. The change history can.

Emailing a file round the team ends with several chronologies. One timeline, with editors and reviewers, stays one.

[Open the Falcon 9 launch timeline](https://timescrolly.com/t/timescrolly/falcon-9-launch)