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What is Neitz and why is it important? My inspiration: http://mekubal.wordpress.com/2011/03/14/at-long-last/#comments

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What is Neitz and why is it important? – Double AA Jan 12 '14 at 1:35

Netz is a misnomer for hanetz, i.e. hanetz hachama, sunrise. It's important as the earliest or best time l'chatchila to do various mitzvos, and as a marker used in computing other z'manim.

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In particular, the Gemara (Berachos 9b based on Psalms 72:5) says that the ideal time to start saying the Shemoneh Esrei is at hanetz. – Alex Mar 16 '11 at 3:34
@msh, if a mitzva is a night mitzva, it should be completed by midnight, and MUST be completed by dawn ("alos/amud hashachar"), sunrise is too late. It's the day mitzvas that should ideally be done at sunrise or later, but could in a pinch be done starting at dawn. This raises the interesting question -- if the ideal time for Shemoneh Esrei is at sunrise, doesn't that mean you'd be saying Shema just before sunrise (which is okay but less than ideal)? – Shalom Mar 17 '11 at 12:27
@R'Shalom, thanks. – msh210 Mar 17 '11 at 15:18
@Shalom, about your last point: Shema is different than most daytime mitzvos, since it depends on ובקומך - בשעה שבני אדם עומדים. People used to start their workday at (or near) sunrise, so naturally they'd have to wake up earlier. – Alex Mar 18 '11 at 22:03
@Ze'evFelsen , msh210 : see comments here regarding the correct grammar. – Double AA Jan 11 '12 at 5:36

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