Recommendation: omission is reasonable because the application does not request an explanation and the cover letter can focus on current evidence. Keep the timeline accurate on the CV.
Optional one-sentence version: 'After a planned period of family caregiving, during which I completed two certified Excel courses, I returned to administrative work in February 2026 and now use calendar coordination and an Excel expense log in my part-time role.'
Short integration: 'I returned to administrative work in February 2026 after a planned period of family caregiving. I am now applying my scheduling and record-management experience in a part-time role, including calendar coordination and an Excel expense log, and am seeking to return to full-time office coordination.'
Privacy check: family identity, health, care arrangement, and unsupported freelance activity are excluded. Confirm that 'planned' remains the candidate's preferred wording before use.