pru lam jeftu lujvo

j₁=p₁ is the week directly before p₂ by standard j₃.

In notes:

jeftu: x₁ is x₂ weeks in duration (default is 1 week) by standard x₃.
bavlamjeftu: j₁=b₁ is the week directly after b₂ by standard j₃.
cabjeftu: j₁=c₁ is this week; j₁=c₁ is the week occuring at the same time as c₂, week standard j₃.