Here is a riddle to figure out
Try to read between the lines
I'll give you clues throughout the poem
That will only be written in rhymes

I'm always seen at Christmas
Some people think I'm great
I'm known for peeking your interest
But I'll always make you wait

The day before your wedding
And I'm never far away
You just can't wait till it gets here
But I'll make it your longest day

I'm always at the hospital
When all the children are born
And the night they're saying trick or treat
As all the costumes are worn

Well, have you figured it out yet?
Can you tell me who I am?
For I've given you all the possible clues
That I absolutely can

For some people I've even been known
To give a slight tingling sensation
I know you can't wait for the answer
For I'm simply, anticipation