Usual Schizophrenic Spring Weather

Let's see...  Thursday and Friday we had a combined snowfall amount of almost fourteen inches in Boulder (up in the mountains, they had 2 and 3 feet of snowfall).  It was overcast and cool on the weekend.  Yesterday, we reached a high of 72, with some mild winds - the Chinook that was forecast didn't kick in.  It is currently 50 degrees (F), with 37% humidity outside.  The newspaper says that we'll have a high of 67 today, and we have a good chance of snow tonight.  Hunh?  Yep, it's the usual Boulder schizophrenic Spring weather pattern kicking in.  NOAA says breezy this afternoon and tomorrow, with snow tomorrow morning.  Both NOAA and the forecasters say we'll have snow Friday....  The one thing I have learned since moving to Boulder is that the weather is completely unpredictable - and that the average last day of snowfall in Boulder is May 6...  Folks are encouraged not to plant outside until after Mother's Day, which is on the 8th this year.
   And - just a silly question - why does the date of Easter jump around so much on the calendar?  I mean, the church has chosen December 25 as the day we celebrate the birth of Jesus, no matter what day of the week it falls on.  I easily understand how Jewish holidays seem to change dates, but the synagogues use a lunar calendar that has been in use for thousands of years.  Why does the new, "modern" Christian church use some sort of hocus-pocus theory to set the date of Easter - which can occur, according to the church, in March, April, or May?  I have to admit that, as a child, Easter only meant the Easter Bunny and lots of chocolate, but it seems to me that it usually took place in the last half of April.  Again, that might just be my sugar-fogged brain supplying incorrect information.  But why does Easter float all over three months of the calendar?  At the time, the Romans were using their calendar, and the Jews were using their lunar calendar, so can't a specific date be set?
   Oh, well....  Off to walk the doggies.