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.
I work with a guy who has alot of DeWalt stuff...he work is as good as any. Its WAY WAY more about the person using the tools then the tools themselves. All major brand tools are plenty capable of working up to the specs we need them too. It all boils down to the gizmos, gadgets, color choice and personal preferance.