The phrase "to happen by the end of the year" means that something is expected to occur or be completed within the current calendar year. Full definition
I urge the Mayor to be brave, drop his planned backward steps on the 2015 measures and make the big changes happen by the end of this year.» (itv.com)
«I can categorically tell you: If settling means being placed successfully in Canadian communities, then absolutely that can not happen by the end of the year. (canadianlawyermag.com)
Smartwatches are a slowly grabbing more and more market share out there, and it remains to be seen what happens by the end of this year. (androidheadlines.com)