Britain did not convert to the Gregorian calendar until 1751, when 11 days had to be added to their dates to get the Gregorian dates. In 1639 they were 10 days behind the Gregorian calendar.
Re: Klein Tools Or Greenlee. Both Klein and Greenlee are TOP quality tools with a niche market. They have a few common tools (such as rabis and ratchet cutters) and either is worth buying over pretty much anything else. They are not really direct competitors. I prefer Knipex for most hand tools except linemans.
The Craftsman 20 volt professional tools were high quality, powerful tools. An example of that quality are the ROHM chucks on the drills. These are considered one of the two best available and Craftsman could have gone cheap on that component and no one would have really known except for a few like me and maybe those other people out there still buying them.