I know we're setting the clocks back on Sunday but, are we also setting the calendar back?

Two nights now, I've checked the local weather for the week and on both nights, it says there's gonna be 2 Sundays this weekend and each has a completely different forecast!

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I checked again last night, it STILL says there's gonna be 2 Sundays! I'd like to see how they're gonna pull THIS off!
I know we're setting the clocks back on Sunday but, are we also setting the calendar back?
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