Single org file "foobar.org", containing one task scheduled for Sunday. It is displayed on agenda for Saturday. I build my own emacs, which includes org, on OS Ubuntu 20.04.
foobar.org contents: * Tasks ** TODO Something SCHEDULED: <2022-03-06 Sun> Agenda Displays: Day-agenda (W09): Saturday 5 March 2022 foobar: Scheduled: TODO Something Emacs : GNU Emacs 29.0.50 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo version 1.16.0) of 2022-02-28 Package: Org mode version 9.5.2 (release_9.5.2-22-g33543d @ /usr/local/share/emacs/29.0.50/lisp/org/) current state: ============== (setq org-link-elisp-confirm-function 'yes-or-no-p org-directory "./" org-bibtex-headline-format-function #[257 "\300\236A\207" [:title] 3 "\n\n(fn ENTRY)"] org-agenda-files '("foobar.org") org-export-before-parsing-hook '(org-attach-expand-links) org-archive-hook '(org-attach-archive-delete-maybe) org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers org-cycle-show-empty-lines org-optimize-window-after-visibility-change) org-mode-hook '(#[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook org-show-all append local] 5] #[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook org-babel-show-result-all append local] 5] org-babel-result-hide-spec org-babel-hide-all-hashes) org-confirm-shell-link-function 'yes-or-no-p outline-isearch-open-invisible-function 'outline-isearch-open-invisible org-agenda-before-write-hook '(org-agenda-add-entry-text) org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer) org-confirm-elisp-link-function 'yes-or-no-p org-speed-command-hook '(org-speed-command-activate org-babel-speed-command-activate) org-tab-first-hook '(org-babel-hide-result-toggle-maybe org-babel-header-arg-expand) org-link-shell-confirm-function 'yes-or-no-p org-babel-pre-tangle-hook '(save-buffer) org-agenda-loop-over-headlines-in-active-region nil org-occur-hook '(org-first-headline-recenter) org-metadown-hook '(org-babel-pop-to-session-maybe) org-link-parameters '(("attachment" :follow org-attach-follow :complete org-attach-complete-link) ("id" :follow org-id-open) ("eww" :follow org-eww-open :store org-eww-store-link) ("rmail" :follow org-rmail-open :store org-rmail-store-link) ("mhe" :follow org-mhe-open :store org-mhe-store-link) ("irc" :follow org-irc-visit :store org-irc-store-link :export org-irc-export) ("info" :follow org-info-open :export org-info-export :store org-info-store-link) ("gnus" :follow org-gnus-open :store org-gnus-store-link) ("docview" :follow org-docview-open :export org-docview-export :store org-docview-store-link) ("bibtex" :follow org-bibtex-open :store org-bibtex-store-link) ("bbdb" :follow org-bbdb-open :export org-bbdb-export :complete org-bbdb-complete-link :store org-bbdb-store-link) ("w3m" :store org-w3m-store-link) ("doi" :follow org-link-doi-open :export org-link-doi-export) ("file+sys") ("file+emacs") ("shell" :follow org-link--open-shell) ("news" :follow #[514 "\301\300\302Q\"\207" ["news" browse-url ":"] 6 "\n\n(fn URL ARG)"]) ("mailto" :follow #[514 "\301\300\302Q\"\207" ["mailto" browse-url ":"] 6 "\n\n(fn URL ARG)"]) ("https" :follow #[514 "\301\300\302Q\"\207" ["https" browse-url ":"] 6 "\n\n(fn URL ARG)"]) ("http" :follow #[514 "\301\300\302Q\"\207" ["http" browse-url ":"] 6 "\n\n(fn URL ARG)"]) ("ftp" :follow #[514 "\301\300\302Q\"\207" ["ftp" browse-url ":"] 6 "\n\n(fn URL ARG)"]) ("help" :follow org-link--open-help :store org-link--store-help) ("file" :complete org-link-complete-file) ("elisp" :follow org-link--open-elisp)) org-metaup-hook '(org-babel-load-in-session-maybe) )