Conditional formatting - Automatic banding of months

[sharshra]

In a timelines table, I have the weekly dates. Based on the date entered in the first cell, remaining weeks are calculated. Now, I want to do conditional format to have alternating bands for different months. At present, it is done manually. Month banding becomes incorrect if the dates are changed.

As shown in the sample table below, weeks in Sep to Dec 2024 are banded with today´s date as initial date. If the initial date is changed, the monthly bands should adjust automatically.

excel problems.xlsx
	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y
3	23-Sep-24	30-Sep-24	07-Oct-24	14-Oct-24	21-Oct-24	28-Oct-24	04-Nov-24	11-Nov-24	18-Nov-24	25-Nov-24	02-Dec-24	09-Dec-24	16-Dec-24	23-Dec-24	30-Dec-24
timelines

 

[etaf]

you could use something
=ISODD(MONTH(A$1))

Book3
	A	B	C	D	E	F	G	H	I	J	K	L	M	N
1	23-Sep-24	30-Sep-24	7-Oct-24	14-Oct-24	21-Oct-24	28-Oct-24	4-Nov-24	11-Nov-24	18-Nov-24	25-Nov-24	2-Dec-24	9-Dec-24	16-Dec-24	23-Dec-24
2
3
4
5
6
7
8
9
10
11
Sheet1

Cell Formulas
Range	Formula
B1:N1	B1	=A1+7

Cells with Conditional Formatting
Cell	Condition		Cell Format	Stop If True
A1:N11	Expression	=ISODD(MONTH(A$1))	text	YES

for 2007, 2010 , 2013 , 2016 , 2019 or 365 Subscription excel version
Conditional Formatting

Highlight applicable range >>
A1:Z100 - Change, reduce or extend the rows to meet your data range of rows

Home Tab >> Styles >> Conditional Formatting
New Rule >> Use a formula to determine which cells to format
Edit the Rule Description: Format values where this formula is true:
=ISODD(MONTH(A$1))

Format [Number, Font, Border, Fill]
choose the format you would like to apply when the condition is true
OK >> OK

 

[CesarF]

Hi @sharshra,
If you can use another row (let's say row #2), I suggest you use a formula like this: in J2, put =1, and then in K2..Y2: =if(month(k3)=month(j3),k2,-k2)
Then you can use a formula in your conditional format: if cell values is 1 then set background as white, otherwise, grey

 

[sharshra]

Thanks, @etaf.

 

[etaf]

you are welcome