A multi-mode fuze includes first and second microprocessors, the first microprocessor being connected to a resistor/capacitor oscillator and the second microprocessor being connected to a quartz crystal oscillator, the first and second microprocessors being connected to each other, the second microprocessor being operable to time calibrate the first microprocessor; a safe and arm device connected to the first microprocessor; power storage capacitors connected to the first microprocessor; a nose mounted impact switch connected to the first microprocessor; at least one impact delay circuit connected to the first microprocessor; and at least one acceleration switch connected to the first microprocessor.