Two old ladies

Two elderly ladies have been friends for many decades. Over the years, they partook in many activities and adventures together. Lately, their activities have been limited to meeting a few times a week to play cards.

One day when they were playing cards, one looked at the other and said "Now don't get mad at me - I know we've been friends for a long time but I just can't think of your name. I've thought and thought, but I can't remember it. Please tell me what your name is?"

Her friend glared at her. For at least three minutes she just stared and glared at her. Finally, she said,

Spoiler:

"How soon do you need to know?"