“Dr. ’Abdullah ibn Muhammad al-Tayyaar, may Allaah protect him, mentioned a novel incident that happened to him with Shaikh ’Uthaimeen, saying, ‘The Shaikh invited me alone to lunch in Dhul-Hijjah of 1403 [Sept. 1983], then he said, ‘Do you want to bring anyone along with you?’ So I said, ‘Yes, the Vice Dean, and [also] the Dean of the Faculty of Shari’ah and it’s Vice Dean [too].’ So the Shaikh, may Allaah have mercy on him, said to me, ‘You should come at twelve dhuhr time,’ and he emphasised the fact that I should not be late.

So [when it was time to visit him] we set out for the Shaikh’s house and got there ten minutes after the set time, and there was the Shaikh leaving his house to get into his car, we caught him and said, ‘We’ve arrived, O Shaikh.’ He said, ‘You have children at home, go and have lunch with them. You did not come on time.’ So we insisted [on him changing his mind] so he laughed and said, ‘On the condition that you do not turn up late again.’’”

Al-Jaami’ li-Hayaatil-’Allaamah Muhammad Ibn Saalih al-’Uthaimeen, p. 28.

See here for Al-Albaani’s timekeeping.