Calculate date table from timestamps

Yes, it is. 🙂 Seriously, @jeronimo2334, this was a real challenge.

So I thought about that. I think you just have to make a very small edit:

Table 2 = 
    VAR __Table =
        SUMMARIZE(
            'Table',
            'Table'[id],
            'Table'[weekLength],
            'Table'[firstDate],
            "__DateNum1",INT([firstDate])
        )
    VAR __Calendar = 
        ADDCOLUMNS(
            CALENDAR(
                DATE(2019,1,1),
                DATE(2021,12,31)
            ),
            "__Weeknum",WEEKNUM([Date],17),
            "__DateNum2",INT([Date]),
            "__Year",YEAR([Date])
        )
    VAR __GeneratedTable = 
            FILTER(
                GENERATE(__Table,__Calendar),
                [__DateNum2]>=[__DateNum1]
            )
    VAR __GeneratedTable2 = 
        ADDCOLUMNS(
            __GeneratedTable,
            "__Sequential",
                VAR MaxWeeks = SUMMARIZE(FILTER(__GeneratedTable,[id]=EARLIER([id])),[__Year],"MaxWeek",MAXX(FILTER(__GeneratedTable,[id]=EARLIER([id])),[__Weeknum]))
                VAR MyYear = [__Year]
                VAR MyStart = SUMX(FILTER(MaxWeeks,[__Year]<MyYear),[MaxWeek])
                VAR firstYear = MINX(FILTER(__GeneratedTable,[id]=EARLIER([id])),[__Year])
                VAR myNum = IF(MyYear=firstYear,[__Weeknum],MyStart+[__Weeknum])
                RETURN myNum
        )
    VAR __GeneratedTable3 = 
        ADDCOLUMNS(
            __GeneratedTable2,
            "__WeeksFromMin",
                [__Sequential] - MINX(FILTER(__GeneratedTable2,[id]=EARLIER([id])),[__Sequential]) + 1
        )
RETURN
    SELECTCOLUMNS(
        FILTER(
            __GeneratedTable3,
            [__WeeksFromMin] <= [weekLength]
        ),
        "id",[id],
        "date",[Date],
        "week",[__WeeksFromMin]
    )