If you are trying to complete the fishing trip objective for this week's challenge in Bitlife, you will need to go on a fishing trip with your father. However, doing so may be tricky at first glance as there is no exact option to do it.
So what you will need to do is use the option called to spend time under the relationship tab with your father. That said, to use this option, first, click the relationship tab and then find your father under the list and click them.
After this, you will then need to scroll down and find the activity option at the bottom of the tab. Then to use it, simply hit it and you will spend time with your father.
However, you will need to use the option to spend time multiple times as each activity you spend time with your father the activity you both do is random.
Because of this, you will need to repeatedly use the option until the tab says you and your father went on a fishing trip shows up. When this happens, you will complete the objective, but it will take multiple tries before this happens.
Luckily you can repeat the action as much as you want, so there is no worry about aging or running out of time.