Get the earlier date from the given 2 dates
first date
second date
the earliest date from the given 2 dates
Get the latest date from the given 2 dates
first date
second date
the latest date from the given 2 dates
Returns true if the 2 periods have an overlap greater than 0
start time of the first period
end time of the first period
start time of the second period
end time of the second period
true if the 2 periods have an overlap
Utility class to work with periods
1.0