Year and month

André Marcelo Alvarenga <andrealvarenga@gmx.net>

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2021 2 1 0 1 0 0 0 1 1 0 1 0
2022 0 0 1 0 0 0 0 0 0 0 0 1
2024 0 1 1 0 0 0 0 0 0 0 0 0