This year the return may be more staggered, or less impactful, because a very high percentage of people will continue with Teleworking, which seems to have come to stay, and this may make this contrast not so great, since being able to work from home means that there is the possibility of organizing time and schedules depending on each person's circumstances and needs.
In any case, there are a series of measures that can help us smooth this return, such as returning mid-week, instead of doing it on Monday so that the "blow is not so big". Or in the case of physically returning to the workplace, also having a certain degree of time flexibility that allows each person to readapt at their own pace.
It is also important that when returning from vacation, the entire business staff has very clear objectives, each person's tasks and priorities, in order to enhance the organization of work and projects, and also the motivation of each person to give their best.