Hey @SarahHartholt,
Seems like you've already found a workaround, but also want to share that there's also an earlyvotingdate field as part of the voting locations layer to represent the day in which early voting begins. It's intended to be used with the nextelectdate to show the time period that early voting is available.
Since there's only one day for early voting, and one actual election date, you could use those two fields in the Custom Attribute Display pop-up, like what you have in the screenshot below. You could then add the hours underneath.
On this note, we're planning to update the Election Outreach solutions next month, with plans to update the voting locations schema to include early voting start and end date, and early voting operational hours. This is based on feedback we've gotten from users that we need to better distinguish the early voting period (some times it ends a few days before Election Day), and that early voting operational hours can be different from the operational hours on Election Day.
Daniel