Cron syntax is made up of 6 or 7 fields, separated by a space.
Accepted Cron syntax, by field in descending order, is detailed below in the table. Most Cron syntax is acceptable, however there are a few cases that are not supported. For example, you cannot specify both the Day of Week and Day of Month values.
Notes on allowed special characters
• Commas (,) are allowed to specify additional values. For example, “5,10,30″ or “MON,WED,FRI”.
• Asterisks (*) are used for “every.” For example, “*” in the minutes field is “every minute”.
• Question marks (?) are allowed to specify no specific value in the Day of Week or Day of Month fields.
NOTE: The question mark must be used in one of these fields, but cannot be used in both.
• Forward slashes (/) identify increments. For example, “5/15” in the minutes field means the task runs at minutes 5, 20, 35 and 50.
• The letter “L” means “last” in the Day of Week or Day of Month fields. For example, “0 15
10 ? * 6L” means the last Friday of every month at 10:15 am.
• The letter “W” means “weekday”. So, if you created a Day of Month as “15W”, this means
the weekday closest to the 15th of the month. Also, you can specify “LW”, which would
mean the last weekday of the month.
• The pound character “#” identifies the “Nth” day of the month. For example, using “6#3″ in the Day of Week field is the third Friday of every month, “2#1″ is the first Monday, and “4#5″ is the fifth Wednesday.
NOTE: If the month does not have fifth Wednesday, the task does not run.
Global Threat Condition: Elevated
