https://help.libreoffice.org/latest/uk/text/scalc/01/func_isoweeknum.html
ISOWEEKNUM
https://help.libreoffice.org/latest/is/text/scalc/01/func_isoweeknum.html
ISOWEEKNUM
https://help.libreoffice.org/latest/bn-IN/text/scalc/01/func_isoweeknum.html
ISOWEEKNUM