How do I search for files changed during a particular time period?

Start in the folder most likely to contain it, then use a date modified filter and narrow the results to the period you remember. This searches by a modification-date criterion, not necessarily by when a file was first created. File Explorer searches the current folder and its child folders, and its search options can filter by date modified [S1].

If you are unsure of the exact day, start with a broad period and inspect the results. Refine the dates or search location if there are too many.

Open File Explorer and navigate to the folder where you expect the file to be. Search there rather than in an unrelated location: the search starts in the current folder and its child folders [S1]. Open the search options and use the date-modified filter to narrow the results [S1].

The guidance here confirms that the filter exists, but not a particular date-range command or the exact menu labels for every Windows version. Use the visible filter options in your version rather than relying on a guessed search expression. If you find too few results, try a broader folder or period.

In Finder, search for the item and narrow the results using date criteria. Finder’s guide describes narrowing searches by date and gives modified: as an example for finding items modified on or before a specified date. It also describes searching for items created on a particular date [S2].

That example shows a modified-date search with an upper date boundary; it does not establish a general date-range format or syntax that works in Windows. If you need both a start and end date, use the date controls Finder offers in your version, if available, rather than assuming that another platform’s syntax applies.

Check the name of the criterion before you search. Date modified and date created are separate criteria; Finder’s guidance distinguishes searches for items modified by a date from searches for items created on a date [S2].

For example, if you are looking for a document you edited during a particular week, choose a modified-date filter. If you mean a file first created on a particular day, choose a creation-date criterion where your tool provides one. The guidance here does not explain how every application or file system records or updates timestamps.

Treat that as an approximate range, not an exact date. As a hypothetical, if you are looking for a report you edited sometime last month, search the likely project folder using date modified. If the results are overwhelming, narrow the folder or period; if you see too few, widen one of them. Check likely filenames to confirm you have the right report.

The cited guidance confirms date filters but does not establish how every device, app, or storage location handles timestamps. A result should not be taken as proof of when a file was created. If that distinction matters, check the file details in the application or location where it is stored.

Broaden one search condition at a time: include a parent folder, widen the date window, or reconsider whether you meant creation rather than modification. That makes it easier to identify which assumption was too narrow. Also check that you are searching the location where the file is stored; a date filter cannot find an item outside the search scope.

Use this note to keep track: Likely folder: [folder] Date field: [modified / created] Approximate period: [start] to [end] Next to try: [broader folder / wider period / other date field]

The exact controls and available criteria depend on the search tool; the guidance cited here does not establish a universal method for searching every device or service.