Hebrew has a word that translates literally "as a pair of tomorrows"; using a specialised plural, '-i-yim', used only for pairs, or for things that generally come in pairs. Thus 'garb-iyim' = socks: so the Hebrew for tomorrow, מָחָר, transliterates as 'mahar'*; & the day after tomorrow is 'mahar-iyim'.

~M~

*the 'h' pronounced gutturally, so 'machar' on analogy of loch