Years and years ago, I wrote about an awesome crontab header that I had found somewhere on the net. At the time, I linked to the page but did not include the actual header in the blog post. Now, the site that I linked to is gone, and I could not find the header anywhere in my dot files.
Fortunately, Squarism came to the rescue!
# minute (0-59),
# | hour (0-23),
# | | day of the month (1-31),
# | | | month of the year (1-12),
# | | | | day of the week (0-6 with 0=Sunday).
# | | | | | commands