Oracle DATE column – How to convert to UTC

I have an oracle 10g table with a DATE column type. I need to compare it in a where clause to a value generated by a script that looks like this: TIMESTAMP '2016-05-12 08:00:00.258000 +00:00'. I cannot control the generated TIMESTAMP part, and when I do:

RECORDEDTIME >= TIMESTAMP '2016-05-12 08:00:00.258000 +00:00' it uses the localtime of the RECORDEDTIME which means I am 4 hours off. What function do I call on RECORDEDTIME to get it in UTC matching the other value in the WHERE clause (i.e. it needs to subtract 4 hours as I’m in EST)