In 2013 I was leaving Australia, I was on a student visa. I overstayed by ONE DAY and when leaving the immigration officer pulled me aside and informed me that I will be receiving a 3 year ban for overstaying in the county. My sister bought my tickets and she got mixed up with the dates, that was the reason why I overstayed. I was just naive, thinking it wouldn't be a problem but it was lol
Do I have to mention this for that question or at all? I did buy my own ticket and leave on my own. Just really confused if it has anything to do with the question or not. If I do need to mention it, will it affect my application? I will be applying for the visa on 22nd April as a spouse of an EEA national. Excited & Nervous

Thank you for reading and helping.