Error Message:

An illegal day range has been supplied.

Explanation:

You specified an illegal range of days. You must also type a hyphen between the first and last days of each range.

User Action:

When specifying days, use only the complete names of the days or valid Windows 2000 abbreviations. Valid abbreviations are M, T, W, Th, F, Sa, Su. Use a hyphen to separate the beginning and end of each range of days.