Answer:
I am the beginning of eternity the end of time and space the beginning of every end the end of every place.
What starts with an 'e' and ends with an 'e' but only has one letter?
You use a knife to slice my head and weep beside me when I am dead.
I am the only word that looks the same when spelled upside down.
I go around a yard but do not move. What am I?
No matter how little or how much you use me, you change me every month.