When do I prune my tree?

https://hortnews.extension.iastate.edu/2000/2-11-2000/prunetime.htmlhttps://www.extension.umn.edu/garden/yard-garden/trees-shrubs/pruning-trees-shrubs/

https://www.ipm.iastate.edu/ipm/hortnews/2000/2-11-2000/prunetime.html