https://mongodb.github.io/mongo-csharp-driver/2.5/apidocs/html/P_MongoDB_Bson_BsonValue_IsDateTime.htm
BsonValue.IsDateTime Property
Tests whether this BsonValue is a DateTime.
bsonvalueproperty
https://archive.grafana.com/docs/grafana/v8.2/packages_api/data/isdatetime/
isDateTime | Grafana documentation
grafanadocumentation