Changes
Created Template
{{#expr:({{Computus/a|{{{1|{{CURRENTYEAR}}}}}}}-floor({{Computus/a|{{{1|{{CURRENTYEAR}}}}}}}/4)-floor(({{Computus/a|{{{1|{{CURRENTYEAR}}}}}}}-{{Computus/c|{{{1|{{CURRENTYEAR}}}}}}})/3)+19*{{Computus/b|{{{1|{{CURRENTYEAR}}}}}}}+15) mod 30}}