diff --git a/docs/UserGuide.md b/docs/UserGuide.md
index b49cc02c549..3da8742a539 100644
--- a/docs/UserGuide.md
+++ b/docs/UserGuide.md
@@ -287,11 +287,12 @@ Executing command: `leave 1 m/1,3`
 
 Views all employees who are on leave, with optional filters of month and department.
 
-Format:  `view_leave [m/Month] [d/DEPARTMENT]`
+Format:  `view_leave [m/MONTHS] [d/DEPARTMENT]`
 
 - Gives a list of **all employees** who have leaves planned for the year.
 - The month and department are optional arguments.
 - If no one in the specified department has planned leave dates for the month, an output indicating **no employees is taking leave** is shown.
+- Trailing commas in `MONTHS` (`view_leave m/1,2,3,,,`) will be ignored, but empty months elsewhere (`view_leave m/1,,,2`) will raise an error.
 
 Examples:
 - `view_leave` displays all employees who have planned leave dates in the current year.
@@ -326,6 +327,7 @@ Format:  `birthday [m/MONTH(s)]`
 - The month argument is optional. If **no month** is provided, the birthdays in the **current month** are listed.
 - If there is no birthday in the month provided, return **No employees have birthdays in this month**.
 - Months are separated using ",", e.g. to inquire the employees who have birthdays in Mar and Apr, the input is `birthday m/3,4`.
+- Trailing commas in `MONTH(s)` (`birthday m/1,2,3,,,`) will be ignored, but empty months elsewhere (`birthday m/1,,,2`) will raise an error.
 
 Examples:
 - `birthday` displays all employees who have their birthday in the current month.
@@ -377,7 +379,7 @@ Executing command: `sort name desc`
  
 ### Undoing previous commands: `undo`
 
-Undo the most recent commands that modified the employee list, i.e., `add`, `edit`, `delete`, `leave`, `clear`, `sort`, `redo` commands.
+Undo the most recent commands that modified the employee list, i.e., `add`, `edit`, `delete`, `leave`, `reset_leaves`, `clear`, `sort`, `redo` commands.
 
 Format: `undo`
 
diff --git a/src/test/java/seedu/address/logic/parser/LeaveCommandParserTest.java b/src/test/java/seedu/address/logic/parser/LeaveCommandParserTest.java
index 198b63e0c61..18fed312555 100644
--- a/src/test/java/seedu/address/logic/parser/LeaveCommandParserTest.java
+++ b/src/test/java/seedu/address/logic/parser/LeaveCommandParserTest.java
@@ -17,6 +17,7 @@ public class LeaveCommandParserTest {
     @Test
     public void parse_validArgs_returnsLeaveCommand() {
         assertParseSuccess(parser, " 1 m/2", new LeaveCommand(INDEX_FIRST_PERSON, "0+0000000000"));
+        assertParseSuccess(parser, " 1 m/2,,,", new LeaveCommand(INDEX_FIRST_PERSON, "0+0000000000"));
         assertParseSuccess(parser, " 1 m/-2", new LeaveCommand(INDEX_FIRST_PERSON, "0-0000000000"));
     }
 
@@ -45,5 +46,9 @@ public void parse_invalidArgs_throwsParseException() {
         assertParseFailure(parser, " 1 m/13", LeaveCommand.MESSAGE_INVALID_MONTH + LeaveCommand.MESSAGE_USAGE);
 
         assertParseFailure(parser, " 1 m/-13", LeaveCommand.MESSAGE_INVALID_MONTH + LeaveCommand.MESSAGE_USAGE);
+
+        assertParseFailure(parser, " 1 m/1,,,3", LeaveCommand.MESSAGE_INVALID_MONTH + LeaveCommand.MESSAGE_USAGE);
+
+        assertParseFailure(parser, " 1 m/1,123", LeaveCommand.MESSAGE_INVALID_MONTH + LeaveCommand.MESSAGE_USAGE);
     }
 }