Help me sort out St Peter's!: April, Come she will.

April, come she will
When streams are ripe and swelled with rain
May, she will stay
Resting in my arms again

June, she’ll change her tune
In restless walks, she’ll prowl the night
July, she will fly
And give no warning to her flight

August, die she must
The autumn winds blow chilly and cold
September, I’ll remember
A love once new has now grown old

Paul Simon

I've always loved this Simon and Garfunkel song, loosely based on an old English poem.