To create a filter that shows issues created during the last calendar month, the JQL query must use thecreatedDatefield with thestartOfMonth(-1m)andendOfMonth(-1m)functions to define the time range. The correct query iscreatedDate >= startOfMonth(-1m) AND createdDate <= endOfMonth(-1m)(Option D).

Explanation of the Correct Answer (Option D):

ThecreatedDatefield represents the date an issue was created. ThestartOfMonth(-1m)function returns the first day of the previous month (e.g., April 1, 2025, for May 2025), andendOfMonth(-1m)returns the last day of the previous month (e.g., April 30, 2025). The querycreatedDate >= startOfMonth(-1m) AND createdDate <= endOfMonth(-1m)selects issues created within this range, covering the entire last calendar month.

Exact Extract from Documentation:

Search for issues using JQL

ThecreatedDatefield (orcreatedalias) stores the creation date of an issue. Use date functions likestartOfMonth()andendOfMonth()to define time ranges.

Examples:

createdDate >= startOfMonth(-1m) AND createdDate <= endOfMonth(-1m) returns issues created in the previous calendar month.

Use-1mto indicate one month ago.Note: Ensure date fields use>=and<=for inclusive ranges.(Source: Atlassian Support Documentation, "Search for issues using JQL")

Why This Fits: The query in Option D correctly usescreatedDate,startOfMonth(-1m), andendOfMonth(-1m)withANDto define the last calendar month, making it the correct answer.

Why Other Options Are Incorrect:

created changed during (startOfMonth(), endOfMonth()) (Option A):

Thechanged duringoperator is used for fields that track changes (e.g., status, assignee), not for static fields likecreated. Additionally,startOfMonth()andendOfMonth()without-1mrefer to the current month, not the last month.

Extract from Documentation:

Thechanged duringoperator is invalid for thecreatedfield. Use>=and<=for date comparisons.

(Source: Atlassian Support Documentation, "Advanced searching - operators reference")

createdDate >= startOfMonth(-1) OR createdDate <= endOfMonth(-1) (Option B):

TheORoperator creates a logical error, selecting issues created after the start of the previous monthorbefore the end of the previous month, which includes almost all issues. Additionally,-1is ambiguous and typically invalid without a unit (e.g.,-1mfor one month). The correct operator isANDto define a range.

Extract from Documentation:

UseANDto define a date range (e.g., createdDate >= startOfMonth(-1m) AND createdDate <= endOfMonth(-1m)).ORcreates an overly broad range.

(Source: Atlassian Support Documentation, "Advanced searching - operators reference")

created >= startOfMonth(-1) AND created <= endOfMonth(-1) (Option C):

The-1syntax without a unit (e.g.,-1m) is ambiguous and typically invalid in JQL. The correct syntax uses-1mto indicate one month ago. Additionally, whilecreatedis an alias forcreatedDate, the incorrect time unit makes this query invalid.

Extract from Documentation:

Date functions require units likemfor months (e.g.,startOfMonth(-1m)). Without a unit, the query is invalid.

(Source: Atlassian Support Documentation, "Advanced searching - functions reference")

Additional Notes:

The filter can be created inIssues > Search for issues, saved as a filter, and shared if needed.

Thecreatedalias can be used instead ofcreatedDate, butcreatedDateis more explicit and matches the options.

Ensure the Jira instance’s timezone aligns with the expected month range.