Index: src/OFDate.h
==================================================================
--- src/OFDate.h
+++ src/OFDate.h
@@ -273,10 +273,14 @@
 
 /**
  * @brief Creates a string of the date with the specified format.
  *
  * See the man page for `strftime` for information on the format.
+ *
+ * @warning The format is currently limited to the following format specifiers:
+ *	    %%a, %%b, %%d, %%e, %%H, %%m, %%M, %%S, %%y, %%Y, %%z, %%, %%n and
+ *	    %%t.
  *
  * @param format The format for the date string
  * @return A new, autoreleased OFString
  * @throw OFInvalidFormatException The specified format is invalid
  */
@@ -284,10 +288,14 @@
 
 /**
  * @brief Creates a string of the local date with the specified format.
  *
  * See the man page for `strftime` for information on the format.
+ *
+ * @warning The format is currently limited to the following format specifiers:
+ *	    %%a, %%b, %%d, %%e, %%H, %%m, %%M, %%S, %%y, %%Y, %%z, %%, %%n and
+ *	    %%t.
  *
  * @param format The format for the date string
  * @return A new, autoreleased OFString
  * @throw OFInvalidFormatException The specified format is invalid
  */