l10n.md

@@ -29,3 +29,26 @@ The “canonical” editor for PO files is [GNU Emacs](https://www.gnu.org/softw
           --output-file=locales/cs/LC_MESSAGES/R-Dashboard.po \
           --locale=cs_CZ.UTF-8
   ```
+* Different date format for each of the two languages can be used via `locale_date_format` function from `common.R`. It returns the formatting string according to current `LC_TIME` locale (`%-d. %B %Y` for `cs`, `%B %-d %Y` for `en` and as a fallback):
+  ```R
+  > Sys.getlocale("LC_TIME")
+  [1] "en_US.UTF-8"
+  > format(Sys.Date(), locale_date_format())
+  [1] "September 30 2020"
+  ```
+  ```R
+  > Sys.getlocale("LC_TIME")
+  [1] "cs_CZ.UTF-8"
+  > format(Sys.Date(), locale_date_format())
+  [1] "30. září 2020"
+  ```
+
+  `%c` works as well, but it includes abbreviated day name and time:
+
+   ```R
+  > format(Sys.Date(), "%c")
+  [1] "St 30. září 2020, 00:00:00 UTC"
+  > library(stringr)
+  > str_replace(format(Sys.Date(), "%c"), ", 00:00:00 UTC", "")
+  [1] "St 30. září 2020"
+  ```