The benefits of exercise on health are multiple, and science shows us new discoveries about its benefits practically every week. Each person's response to the effects of exercise is very variable, and there are people who experience very large changes after a few sessions or weeks of training.
There is, therefore, a need to individualize the dose of exercise to the characteristics of each person to maximize its benefits. If you can't choose the time of day to exercise due to family, social or work conditions, don't worry: just exercise when you can and don't forget that every step counts.