Your cruising along counting out longitude lines...you know...time lines...thinking that 45 degrees of longitude is coming up so you should have the end of a time cycle coming up...but no...it a degree off...like the movement stalls out and stops at 44 degree longitude...then at 45 degrees longitude it turns and starts a move in the other direction on the 45 degree longitude...that's the start of the new cycle...the 45.

Suppose you're counting longitude again and you notice things looking a little toppy or bottomy along about 135 degrees...don't look for the top or bottom to be the 135...look for the end of that move to be at the 134 with 135 being the beginning of the next move...either up or down.