How to change the duration of calendar view in a report

[wanwan]

How to change the duration of calendar view in a report?

I want to make the duration longer, not an hour,  the duration of the field I defined

[wanwan]

In fact, my fields are divided into date and time。

now  I can put the date and time fields in one date/date field,

but how can I calculate the end time according to the duration?