Yes! When dialing in a search, you can always add date and time constraints to narrow the scope of your results. These date and time constraints are defined by your browser's local time at the time of events. OmniSearch only returns sessions in which all the qualifying events of the search criteria fall into the time range.
At the top left of the search UI you'll see an available drop down for date range. Choose a preset time range or choose "Custom" to include specific dates. You can also add time constraints to the Custom date fields using the format MM/DD/YYYY HH:MM.