使用Google脚本仅在一周的指定天中生成预定数量的日期列表，但不包括特定的日期列表

Question

I want to make a list of meetings/lessons (in google sheets) which recurring at sundays and wednesdays only (for example), except holidays and/ot other predefined dates. the list of "holidays" may be growing, so the list must skip this days and always stay on 69 meetings/lessons enter image description here the simple function in cell A3 and so on like:

=IF(WEEKDAY(A2)=1,A2+3,A2+4)

won't work properly because it doesn't know skip list of holidays. and

=WORKDAY.INTL()

won't work because can't apply to only sunday,wednesday. so I must create a script that uses same rules as =WORKDAY.INTL() but teach it to use only specific weekdays.

any help be appreciated. thanks in advance.

Answer 1

Assume, we have values in cells:

• B2 = 69 (or any number)
• A2 = 3/9/2016 (first date)
• C2:C = list of dates to skip

Paste this formula into cell A3 :

=QUERY(ARRAYFORMULA((if(ISEVEN(row(OFFSET(A1,,,B2-1+counta(C2:C)))),row(OFFSET(A1,,,B2-1+counta(C2:C)))/2*3+row(OFFSET(A1,,,B2-1+counta(C2:C)))/2*4,(row(OFFSET(A1,,,B2-1+counta(C2:C)))-1)/2*3+(row(OFFSET(A1,,,B2-1+counta(C2:C)))-1)/2*4+4)+A2)*(--not(regexmatch(text(if(ISEVEN(row(OFFSET(A1,,,B2-1+counta(C2:C)))),row(OFFSET(A1,,,B2-1+counta(C2:C)))/2*3+row(OFFSET(A1,,,B2-1+counta(C2:C)))/2*4,(row(OFFSET(A1,,,B2-1+counta(C2:C)))-1)/2*3+(row(OFFSET(A1,,,B2-1+counta(C2:C)))-1)/2*4+4)+A2,"dd/mm/yyyy ddd"), "(?i)" & JOIN("|",filter(C2:C,C2:C>0)))))),"select Col1 where Col1 > date'1900-01-01'",0)

The formula will expand automatically and show the result.

Numbers 3 and 4 in the formula may be changed to select another days.

Date format "dd/mm/yyyy ddd" in formula is to be changed to your format.

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Example

Please, try it yourself