The easiest way to create a chronology article is to use one of the three templates provided for AM, FM, and television stations. They differ only in that the AM template shows frequency in kHz, the FM template shows frequency in MHz, and the TV template gives channel numbers instead of frequency.
There are three boxes on this page, and each one will create an appropriate page. Just enter the call letters (without the "-FM" or "-TV," please) and click the button next to it. You will see a form, with places for date, previous call, city, frequency (or channel, if TV), owner, and next call. Enter the information (leave it blank if you do not know it) and save the page. (In order to be able to make further edits to the page, add the key "subst:" (without the quotes, but including the colon) right after the opening double braces. Edit the page again after your initial save if you need to delete inappropriate lines (like previous call if the station did not have one or you don't know what it is).
A few standards. Please write dates with months spelled out ("June 7, 1941," not "6/7/41"), and spell out states ("Indiana," not "IN"). Some people do not seem aware that the two-letter state abbreviations are not supposed to be used for anything but postal addresses, and they use them for all sorts of other things. It should be a rule that the two-letter symbols are NOT used on this Wiki.
If you want to update an existing chronology, use these forms: