Is there function to get day name from the date?

Is there function to get day name from the date?

[Jean Louis]

Is there maybe native Emacs Lisp function that can give me the name of
the day from the date?

In PostgreSQL I can do this:

SELECT to_char('2025-01-02'::date, 'Day');

  to_char  
-----------
 Thursday 
(1 row)


Maybe Emacs has something like this built-in?

Jean Louis

Re: Is there function to get day name from the date?

[Eduardo Ochs]

On Thu, 2 Jan 2025 at 07:35, Jean Louis <bugs@gnu.support> wrote:
>
> Is there maybe native Emacs Lisp function that can give me the name of
> the day from the date?
>
> In PostgreSQL I can do this:
>
> SELECT to_char('2025-01-02'::date, 'Day');
>
>   to_char
> -----------
>  Thursday
> (1 row)
>
>
> Maybe Emacs has something like this built-in?
>
> Jean Louis


Please try this,

(format-time-string "%A %a %u %w")
(format-time-string "%A %a %u %w" (parse-time-string "2024-12-28 12:00"))
(format-time-string "%A %a %u %w" (parse-time-string "2024-12-27 12:00"))

fix the bug, and send the fixed version to the list!
Cheers =),
  Eduardo

SOLVED - Re: Is there function to get day name from the date?

[Jean Louis]

* Eduardo Ochs <eduardoochs@gmail.com> [2025-01-02 15:45]:
> Please try this,
> 
> (format-time-string "%A %a %u %w") ➜ "Thursday Thu 4 4"
> (format-time-string "%A %a %u %w" (parse-time-string "2024-12-28 12:00")) ➜ "Thursday Thu 4 4"
> (format-time-string "%A %a %u %w" (parse-time-string "2024-12-27 12:00")) ➜ "Thursday Thu 4 4"
> 
> fix the bug, and send the fixed version to the list!

;; Parse the date string using date-to-time
(defun parse-date-string (date-string)
  (date-to-time date-string))

;; Format the parsed time
(defun format-date-string (format-string date-string)
  (format-time-string format-string (parse-date-string date-string)))

;; Test the functions
(format-date-string "%A %a %u %w" "2024-12-28 12:00") ➜ "Saturday Sat 6 6"
(format-date-string "%A %a %u %w" "2024-12-27 12:00") ➜ "Friday Fri 5 5"

(format-date-string "%A" "2025-12-27 12:00") ➜ "Friday"
(format-date-string "%A" "2025-01-02 12:00") ➜ "Thursday"
(format-date-string "%A" "2025-01-02 11:59") ➜ "Thursday"
(format-date-string "%A" "2025-01-02 00:00") ➜ "Thursday"

I got it.

-- 
Jean Louis