Dates on a résumé, and the two rules that matter

Dates are matched by pattern, which makes them one of the few places where formatting has a measurable cost. Two rules cover it.

ConxfolioPublished 2026-09-12

— four digits, one format.

Dates are one of the few parts of a résumé where formatting has a cost you can measure. They are matched by pattern rather than understood, so a pattern that does not match is a date that does not exist.

Rule one: four digits

Write 2019, not an apostrophe and two digits. The shortened form costs eight points of parseability in the check here, and the finding says plainly what it found and how many. Four-digit years are also unambiguous a decade from now, which matters more than it sounds.

Rule two: one format

Choose one and use it in every entry, in experience, education, certifications and projects alike. Mixing month-and-year dates such as "Mar 2021" with numeric dates such as "03/2021" costs four points here and reads as carelessness to a person, which is the larger cost of the two.

Which format to choose

"January 2021 to March 2024" is the clearest. "Jan 2021 – Mar 2024" is compact and safe. Years alone, "2021 to 2024", are acceptable and common for older roles. Numeric-only dates are the weakest choice, because the day-month order differs between countries and a reader has to guess.

The current role

Start date, then "present" or "current". Use the same word in every current entry. Avoid leaving an end date blank, which some layouts render as a dash into nothing and some parsers read as an unfinished range.

Short gaps

Months make a three-month gap visible; years alone hide it. Switching to years only around one period is the version that causes trouble, because the inconsistency itself points at the thing you were trying not to point at. Pick one convention for the whole page, and where a gap is long enough to need a word, the gap guide covers the one line it takes.

Where dates do real work

They carry the progression at a single employer, they show how long each piece of work lasted, and they let a reader weigh the evidence by recency. The guide to several roles at one employer shows how two consecutive date ranges say "promoted" without a word of claim.

Fixing them everywhere at once

In the résumé builder the start and end dates are separate fields on every entry, so a consistent format is a property of the document rather than something you retype. Change them once, export, and run the check on the exported file: the date findings disappear from the parseability row, which is the cheapest handful of points on the whole report.

Dates in education, certifications and projects

The same format applies everywhere on the page, not only in employment. A degree with years, a certificate with an issue year, a project with a month and a year: all in the convention you chose for the rest of the document. The date rules read the whole text, so a certifications block in a different style is enough to trigger a mixed-format finding on an otherwise consistent page.

For a certification that expires, both years belong on the line, which the certifications guide covers along with what an entry needs to be checkable.

Ranges, and the characters between them

Use the word "to" or a plain hyphen between the two years. Typographic dashes are fine when the export embeds them properly and are one more thing that can come back as a box when it does not, which the fonts guide explains. Avoid the compressed forms that leave the century implied, and avoid writing a range in one style in the experience section and another in education. None of this is difficult; all of it is the kind of detail that a careful reader notices and a pattern-matching parser depends on.

The one case where a date is genuinely awkward

A role you left and returned to, or two spells at the same employer with something in between. Write them as two entries in date order rather than as one range that quietly includes a period you were somewhere else. The page stays accurate, the dates stay consistent, and the return reads as what it is, which is an employer choosing you twice.

Where the interval was short and unremarkable, no explanation is needed at all. Where it was long, one line covers it, and the gap guide covers the wording.