Je was op zoek naar: timekeeping (Engels - Maleis)

say, ‘they are timekeeping signs for the people and [for the sake of] hajj.’
katakanlah: "(peredaran) anak-anak bulan itu menandakan waktu-waktu (urusan dan amalan) manusia, khasnya ibadat haji.

c/david a. king. in synchrony with the heavens: studies in astronomical timekeeping and instrumentation in medieval islamic civilization. volume 1: the call of the muezzin. (studies i–ix.) 900 pp., index. leiden/boston: brill academic publishers, 2004. david a. king. in synchrony with the heavens: studies in astronomical timekeeping and instrumentation in medieval islamic civilization. volume 2: instruments of mass calculation. (studies x–xviii.) lxxvi 1,066 pp., figs., apps., index. leiden
c/david a. raja. in synchrony with the heavens: studies in astronomical timekeeping and instrumentation in medieval islamic civilization. jilid 1: panggilan muazin. (kajian i–ix.) 900 hlm., indeks. leiden/boston: brill academic publishers, 2004. david a. king. in synchrony with the heavens: studies in astronomical timekeeping and instrumentation in medieval islamic civilization. jilid 2: alat pengiraan jisim. (kajian x–xviii.) lxxvi 1,066 hlm., rajah., aplikasi, indeks. leiden