Their word for Friday 31st January is: summa rerum, n.
summa rerum, n.
[‘The highest public interest; the public good (cf. the sum of things at sum n.1 Phrases 2a).’]
Pronunciation: Brit. /ˌsʌmə ˈrɛːrəm/, /ˌsʊmə ˈrɛːrᵿm/, U.S. /ˌsəmə ˈrɛrəm/, /ˌsʊmə ˈrɛrᵿm/
Origin: A borrowing from Latin. Etymon: Latin summa rērum.
Etymology: < classical Latin summa rērum < summa sum n.1 + rērum of things or affairs, genitive plural of rēs thing (see res n.1).
The highest public interest; the public good (cf. the sum of things at sum n.1 Phrases 2a).
1715 J. Swift Enquiry Queen's Last Ministry i, in Wks.(1765) VIII. i. 50 I believe, no Minister of any party would..have scrupled to make the same step, when the summa rerum was at stake.
1837 T. De Quincey Revolt of Tartars in Blackwood's Edinb. Mag. July 103/1 They easily understood that too capital an interest (the summa rerum) was now at stake.
1950 Scotsman 29 June 9/5 It is permissible to remain sceptical to doubt whether the summa rerum can be condensed into two or three categorical equations.
2003 Noûs 37 405 The official theory of the Pacidius, however, will acknowledge only the summa rerum as a source of action without change.