A timeline is a claim about order and period. Before you rely on one, check it with five questions: period, order, gaps, date types and evidence. This lesson gives you that check and shows it on a flawed timeline.
It is the final skill in chronology and historical context, and it applies the work from building a sequence and separating sequence from cause.
What is the five-point check?
- Period. Are all entries inside the stated years? Is the first entry close to the start and the last close to the end?
- Order. Is each entry in date order, using event dates and not document dates?
- Gaps. Is any stretch empty or any step missing, so that the story jumps?
- Date types. Is each date exact, approximate or relative, and is it labelled so?
- Evidence. Can each entry be traced to a source, and is any cause claimed without support?
Worked example
Task: “Make a timeline of the Port Selan seawall project, 1901 to 1903.” Everything about Port Selan is invented for practice.
A student’s draft:
| No. | Entry |
|---|---|
| 1 | 1900: quay rebuilt |
| 2 | 20 October 1901: storm floods warehouses |
| 3 | 22 December 1902: contract signed |
| 4 | 12 May 1902: council votes for wall |
| 5 | 15 August 1903: wall complete |
| 6 | 1 February 1904: railway opens, which caused trade to rise |
Point 1, period. Entry 1 (1900) is before the period. Entry 6 (1904) is after it. Both are outside 1901 to 1903.
Point 2, order. Entry 3 (22 December 1902) comes before entry 4 (12 May 1902), but 12 May is the earlier date. Swap them.
Point 3, gaps. Between the vote (May 1902) and the contract (December 1902) there are seven months with no entry. The gap is real in the evidence: the invented sources record nothing in between. Add a note: “no event recorded in these sources”. Between the contract and completion, add “spring 1903: work due to start (planned, not confirmed)”.
Point 4, date types. The storm is “about 19-20 October 1901”, since the report is dated the 20th and describes an overnight storm. Mark it approximate.
Point 5, evidence. Entry 6 says the railway “caused trade to rise”. No source given supports that cause. Remove the claim (see the lesson on sequence and cause).
Corrected timeline, 1901 to 1903.
- About 19-20 October 1901: storm floods warehouses (approximate).
- 12 May 1902: council votes for the wall.
- 22 December 1902: contract signed.
- Spring 1903: work due to start (planned).
- 15 August 1903: wall complete.
The 1900 and 1904 entries are removed. If the question allowed a note on context, write it outside the timeline: “The quay had been rebuilt in 1900 and a railway opened in 1904.”
What mistake do students make?
Mistaken check: “My timeline has six entries in neat boxes, so it is complete.”
Neatness is not accuracy. A student who checks only that the boxes look balanced misses entries outside the period and entries out of order. The correction is to run the five points in the same sequence each time, and tick each one.
Check yourself
1. A timeline titled “1902 to 1903” begins with 20 October 1901. Which point fails and what is the fix?
Show answer
Point 1, period. The entry is before 1902. Remove it from the timeline, or move it into a short note of background outside the timeline.
2. Spot the order error: 12 May 1902; 22 December 1902; 15 August 1903; 2 January 1903.
Show answer
2 January 1903 is out of place. It should sit between 22 December 1902 and 15 August 1903. If it is a document date for a letter, check whether it is an event date at all.
3. An entry reads “Spring 1903: work begins.” The only evidence is a letter saying work “starts in the spring”. What should you change?
Show answer
Label it as planned and relative: “spring 1903: work due to start (planned)”. The letter shows an intention, not that work began.
Where this leads next
You now have all four skills in this module. Put them together in the integrated practice set, and then move on to evidence and source interpretation.
A teacher can check timelines for your own depth study and set options in online one-to-one History tuition.