Calculate times between dates and times in Excel

[Helio]

How can I calculate the time in minutes between 2 events with format
(date,hour) or format date in a cell and time in another cell, without
weekends and holidays, for employees with 8 hours/day.

 

[Fred Smith]

It depends what you mean by "format (date,hour)". If they are true Excel
date/time cells, use:
=(a2-a1)*24*60
Format as a number

If they are not date cells, give us a sample of what they look like.

Regards,
Fred