I am sorry, I do not have that information. I think you could call the Zoo and ask what day is their senior day. But, Seniors pay three dollars less anyway. Have a great time at the Zoo.
Yes, but onl during the months of September and October. Here's the link to get more information: https://www.toledozoo.org/seniors
I know for toledo inhabitants there is free entry on Monday. But you can ask for this calling them.
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