On the eighth day you shall have a solemn assembly: Since this is the second gathering for worship during the Festival of Shelters (see verse 12 for the first one), it may be better to render this clause as “On the eight day of the festival you shall have another solemn assembly” or “… gather again for worship.” Another possible model is “On the eighth day have a closing meeting” (New Century Version). Even though the Hebrew expression for solemn assembly differs from the one rendered “holy convocation” in verse 12, it is similar in meaning. The Hebrew term here occurs only occasionally in the Pentateuch, where such an assembly is dedicated to the LORD (see also Lev 23.36; Deut 16.8).

You shall do no laborious work: See at 28.18.

Quoted with permission from de Regt, Lénart J. and Wendland, Ernst R. A Handbook on Numbers. (UBS Helps for Translators). Miami: UBS, 2016. For this and other handbooks for translators see here .