In SPARQL, you can compare two dates using the FILTER function with the xsd:dateTime or xsd:date data types. You can use comparison operators such as <, >, <=, >=, =, or != to compare the dates. For example, to find all events that occurred after a certain date, you can write a query like this:SELECT ?event
WHERE {
?event a :Event ;
:date ?date .
FILTER (?date > "2021-01-01T00:00:00"^^xsd:dateTime)
}This query will return all events with a date after January 1, 2021.