Two select field cck field
Try Date module. This provides the cck widget to select the date.

The Select List date widget presents users with a drop-down list or textfield for each part of the date (year, month, day, hour, etc.). The whole selector is collapsed onto a single line using css (except for the timezone selector, if date-specific timezones are collected). The selector is highly configurable and you can set it up to use 5, 10, or 15 minute increments for minutes and seconds, or make some parts of the selector use textfields instead of drop-downs, useful to allow any year without creating a huge drop-down selector.

For more Documentation See here