Year and month

Adrien Poupa <adrien@poupa.fr>

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2018 1 0 0 0 0 0 0 0 0 0 0 0
2020 0 0 1 4 0 0 0 0 0 1 0 0
2023 1 0 0 0 0 0 0 0 0 0 0 0