I conflated a couple things here, and somewhat caused an issue.

The East Coast of the US is 4 or 5 hours off from the UK, depending on the time of year. The countries switch a different dates of the spring and fall.

That being said, EST is technically invalid for July. The US East Coast is on EDT, not EST then. So the time would be 5. However, the EST value still can be used, even though the UK is on daylight time.

Strange, and my apologies. I should have chosen a different 0 time.