Lindsay Lohan Birthdays on a Budget

7/2/2010 7:00 AM PDT

Lindsay Lohan Birthdays on a Budget

Lindsay Lohan turns 24 today and it's not gonna be the best birthday ever ... by a long shot.

Lindsay's friends tell TMZ ... so far, she's made no plans.  One of her best friends put it bluntly, "I mean there's not much you can do with a monitoring bracelet and no money."

Lindsay's friends say this weekend will be Lindsay's toughest test.  She's got her SCRAM on tight (though she's bitterly complaining it's ruining her life), so alcohol is off limits for her BD and for the July 4 weekend.

If Lindsay stays dry until Tuesday, it's possible Judge Marsha Revel will show her some mercy.  Since her last court appearance, Lindsay has brought herself up to date on her Alcohol Ed classes, and she's passed every drug test.

Lindsay may have a crappy weekend, but she had better hope Judge Revel has a good one.