% Lecture dates for INFO123 S?? 2022.
\newcount\lecnum
\newcount\weeknum

\newcommand{\LectureDate}[1]{%
    \lecnum #1\relax%
    \advance\lecnum by -1\relax%
    \ifcase\lecnum%
        2 March% lecture 1
        \or 4 March% lecture 2
        \or 9 March% lecture 3
        \or 11 March% lecture 4
        \or 16 March% lecture 5
        \or 18 March% lecture 6
        \or 23 March% lecture 7
        \or 25 March% lecture 8
        \or 30 March% lecture 9
        \or 1 April% lecture 10
        \or 6 April% lecture 11
        \or 8 April% lecture 12
        \or 13 April% lecture 13
        \or 27 April% lecture 14
        \or 29 April% lecture 15
        \or 4 May% lecture 16
        \or 6 May% lecture 17
        \or 11 May% lecture 18
        \or 13 May% lecture 19
        \or 18 May% lecture 20
        \or 20 May% lecture 21
        \or 25 May% lecture 22
        \or 27 May% lecture 23
        \or 1 June% lecture 24
        \or 3 June% lecture 25
        \else ????%
    \fi%
}

\newcommand{\LectureDateByWeek}[2]{%
    \weeknum #1\relax%
    \advance\weeknum by -1\relax%
    \multiply\weeknum by 2\relax%
    \advance\weeknum by #2\relax%
    \LectureDate{\the\weeknum}%
}