Yes, I tell you the world will end. Just not this year... Lets say Hallmark decided to make a decade calendar. Pretty sweet no more calendars for 10 years. you got one thats all you need. Now lets say Hallmark goes out of business 8 1/2 years from now. The haven made a new decade calendar. Does that mean the world is going to end when your calendar does? Only an idot would think so.
Mesoamericans created a 5125 year long calendar, but also had two other calendars, a 365 day Sol calendar, and the 260 day Haab calendar.
Now the other two calendars were widely used but the had one problem, the repeated every 52 years, so the only had to make 52 of them. Well if you wanted describe a date past 52 years you just couldn't do it with those calendars, so the have the long calendar. Well the Maya "went out of business" before there was a need to make the next long calendar. There is no prophecy saying that the would will end or anthing like that from them.
So yes the world will end, I just don't think I will happen this year... In face the world probably wont "end" while humans still live on it. We will either have left the planet, because the sun is going to go nova, or we will be dead, or we will have evolved in to something new.