Hello @Brad-and-Amanda0,
Having searched with instant book on and with it off and both when logged in and logged out I too can't find your listing in Labrador for dates this month and for May 2018.
It may take a day for a newly published listing to appear in searches. If it's now more than 24 hours since you published it you should contact Airbnb support.
I have one suggestion. You say that your lisitng is unavailable until April 2018 but, on your calendar, all dates from today the 25th of November onwards are shown as available. Since you have instant book turned on someone can now book any date from today and it will be automatically confirmed without you having to approve it.
You should block all dates from today until whenever you can accommodate guests.
The links below have more information on blocking, instant book and searching.
How do I make dates available or blocked on my calendar?
Searching-for-your-Instant-Book-Listing
Your-top-questions-about-Airbnb-Search
Answers-to-your-top-Instant-Book-questions
How do I turn Instant Book on or off?
Steve.