Traditional IRA contribution in February 2019, converting the Traditional to Roth IRA in February 2019.

My wife contributed $5500 to a traditional IRA in February 2019 (for tax year 2018). She converted the $5500 in the traditional IRA to a Roth IRA a few days later (AKA Backdoor Roth IRA). Do we need to report the contribution to the traditional IRA on the 2018 tax return, then report the conversion on the 2019 Tax Return?