Date time libraries in React

Hi guys,
I am currently building a personal project a bit stuck at deciding the best way forward for my scenario, so basically I am looking to bring in customised date time (next seven days and between 10:00 to 20:00) user-next 7 days activities and in the boxes i would like to fill in depends on data from DB.
I came across react weekly calender, but then i am thinking how will the API call works as if the use look for other than standard next seven days info, i mean for every new click of customer will fire a new API call or something, any suggestions for best way forward in my case. Thanks