Challenge 1: Ride 1000 miles in at least one month this year ... or as many months as you want ... go for all 12 months if you have the time and energy!!
Challenge 2: Ride 1000 kilometres (~622 miles) in at least one month of the year. Go for all 12 if you can!!
Challenge 3: Pick a number that's a challenge for you and try to ride that at least one month this year. It might be a 2000-mile month or a 500-km month. It's up to you.
Ride ... enjoy ... report!!
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Note: I know these challenges won't fit into everyone's training plans, or life plans, and I know these might not interest everyone, so there is absolutely no pressure to participate.