What's today? Sixth of January? Wasn't the fifth of January the day Monaco La Palmas aren't supposed to start?
Really tho, it would help to know engine type and fuel. I have had a problem with my transmission selector switch not being in neutral and the engine wouldn't start. Scares the heck out of me and I start seeing dollar signs.
Try "jiggling" your tranny selector lever if you can.
Have someone stand by the starter side of your engine and listen for any "starter type" noise. If none, then your problem is most likely an electrical issue with a solenoid or relay.
Batteries fully charged? Checked? Post connections corroded or loose?