Mr. R.’s World of Math

A few minutes after I’d switched with the basketball, I heard the mother come back out with Margie.
“Where’s the face you drew?” screamed Margie, “It’s gone!”
Mother walked over, “Don’t be silly Margie,” but she saw the face was missing too.
“This is very strange,” said the mother, “faces just don’t disappear off pumpkins…”
Margie picked up the ball and yelled, “Hey this isn’t my pumpkin, this is my basketball,” and she began to cry.
“I want pumpkin! I want pumpkin!! I want pumpkin!!!”
“We’ll find it,” said the mother, “Pumpkins can’t just walk away.”
“Well, where is it?”
“I don’t know, we’ll have to look for it.”
Margie started to walk around screaming, “Mr. Pumpkin, where are you, Mr. Pumpkin? Come here Mr. Pumpkin.”
I lay as still as I could, hoping I wouldn’t be discovered by Margie. I held my breath as she came a little closer to where I was.
‘Please don’t see me, please don’t see me, please don’t see me,’ I repeated to myself.
But Margie saw me…”Pumpkin!” yelled Margie when she saw me…”Pumpkin-Umpkin! Pumpkin-Umpkin!”she screamed as she ran over and gave me a big hug, and a disgusting wet kiss.

If Margie hadn’t discovered me, I would have been safe for at least 10 more months.
How many DAYS would I have been safe for?

(assume each month has 31 days)