It's bullshit. Google Gemini says:

"No, there is no truth to the claim that Canada has announced an "amnesty day" for Bitcoin miners. No credible news sources have reported on such an event, and the Canadian government has made no official statements about plans to combat climate change by targeting Bitcoin mining.

Bitcoin mining does consume a significant amount of energy, and there have been concerns about its environmental impact. However, Canada has not taken any specific actions to address this issue in relation to Bitcoin mining.

It's important to be wary of online information that seems too good to be true, especially when it comes to claims about government policy. Always check for reliable sources before believing anything you read online.