Have Pins light up after pushing a button/switch
You can use diodes to connect each pin (LED?) to each switch that should activate that pin.







simulate this circuit &ndash; Schematic created using CircuitLab

Sorry for the not very readable circuit, I did not find a way to rearrange the components or the wires. SW1 would be for year1 (D1 and D2), SW2 for year2 (D3 and D4), SW3 for all.

NB the values are nonsense too. One day I might learn the editor.

(Nice rework, Samuel!)