Construction complete day and Launching day are 2 different thing I guess. So this is like her getting her first job.
Not really. There are three dates when it comes to ships. Laid Down, Launched, and Commissioned. In Naval traditions they are basically the equivalent to conception, birth, and baptizing (or whatever other religious equivalent). So launch day is usually used as the birthday.
Congratulations!5th March, 1923 is Light Cruiser Yuubari's launching day.Yet another year of trying out lots of things - wonderful!Safety First