Easily format cells to bold and a certain background color

I
          record the weather for each day of the year....it's a hobby.

It
          would be simplest if Calc could format each Sunday in bold
          font and a gray background.  With many Sundays in a year it
          takes too long to manually change each year's Sundays.

I have
          sample Calc sheet I use but don't know where I can upload it
          so you can take a look at it.

Thanks,

Peter
          Dutton

If I understand what you want, and that cells have the date value in them.
See if this is what you are trying to do?
In Cell A1 put =now()
in Cell A2 put =a1+1
Copy A2 to A3:A33
Highlight Range A1:A33
Format/Conditional/Condition
Select Formula is
Enter Formula WEEKDAY($A1)=1
I added a new style GrayBold that set font to bold, and background to
gray4
Than OK.

certain background color
Date sent: Wed, 18 Nov 2020 18:40:04 -0500

Hi,
I am assuming your dates are in column "A", and the data in columns B
and next. You can easily do this with conditional formatting:

1) Select your dates and data
2) From the Format menu > Conditional
3) On the Conditional Formatting panel, in the first drop-down, select
"Formula is"
4) Enter the formula: WEEKDAY(INDIRECT(ADDRESS(ROW(),1)),2)=7
5) Select a style to apply. I would say "Accent 3" is the one you are
looking for, but you can create your own and select it there
6) Hit OK. Your Sundays should now be shown in Accent 3 (bold with grey
background)

What the formula does:

WEEKDAY(date,2): returns the day of week, with Sunday being day 7
ADDRESS(ROW(),1): Dynamically creates the cell address of your date; if
you are on the second row, this formula returns A2
INDIRECT(): Returns the content of; so INDIRECT(ADDRESS(ROW(),1)) on
row 2 returns the content of A2 (a date since your dates are in column
A)
WEEKDAY()=7: Sunday

If you want to upload a file, you can go directly on the
nabble.documentfoundation.org page. I believe you can upload a file
with your message from there. You can also send it to me directly if
you're stuck and I'll give you a hand.
I hope this helps.

Rémy.

=On 18 Nov 2020 at 19:23, Remy Gauthier wrote:

certain
&#

Hi,
Call it occupational hazard. I work with airlines where day 1 is
Monday. Whenever I create DOW formulas, I will always use the option
that will make Monday - Sunday as days 1-7. The default option is
definitely fine and my usage was a bit of an overkill in this specific
example.
Regards,Rémy.