I fully experienced postnatal depression, starting around 12-15 months, and it wasn't until relatively recently (my kid is now 18 years old) that I realized it.

We were living in a 1 bedroom in the city when we had our kid, and moved to a house in a suburb when the kid was 9 months old. My wife and I both worked, but I had a longer commute and a job that frequently required later evenings. Between the job and keeping up the house, I had a few minutes in the morning, random holidays, and part of one weekend day to really spend time. I spiraled into depression and insomnia, overwhelmed by all the work required to keep up the house while also feeling like a terrible father and husband. I was withdrawn, had angry outbursts, and my daily work routine involved sitting in my car in the train station parking lot having a good cry before heading home.

Before our kid started kindergarten, we decided to sell the house and rent a place in the city. Our apartment was about a 30 minute walk from my office with my kid's school as the 1/2 way point. I was actually able to walk my kid to school every day, coach sports that started at 5pm, and have both weekend days available to go on adventures around the city.