0-59
0-23
1-31
1-12
0-7
at 9:00 AM Monday through Friday
* * * * *
*/5 * * * *
*/15 * * * *
*/30 * * * *
0 * * * *
0 */2 * * *
0 */6 * * *
0 */12 * * *
0 0 * * *
0 9 * * *
0 9 * * 1-5
0 9 * * 0,6
0 9 * * 1
0 17 * * 5
0 0 1 * *
0 0 L * *
0 0 1 1,4,7,10 *
0 0 1 1 *
*
*/n
n-m
n,m
L