On Tue, 23 Feb 2010 17:22:07 -0800 (PST), Andrew Usher <k_over_hbarc@yahoo.com> wrote in <news:b0ea53eb-270f-4efa-ae7f-41a30076c48c@k41g2000yqm.googlegroups.com> in sci.math,sci.physics,sci.astro,sci.lang,alt.usage.english:
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> You can define the week any way you want, but the > historical seven-day week begins on Sunday. [...]
*A* historical seven-day week begins on Sunday; another historical seven-day week begins on Monday.
