diff --git a/README.md b/README.md
index 7bf4976..759d475 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,12 @@ This is a plugin for Day.js that allows for Date calculations to take place that
     - [businessDaysInMonth() => [Day.js Object]](#businessdaysinmonth--dayjs-object)
     - [lastBusinessDayOfMonth() => Day.js Object](#lastbusinessdayofmonth--dayjs-object)
     - [businessWeeksInMonth() => [[Day.js Object]]](#businessweeksinmonth--dayjs-object)
+    - [getHolidays() => [string]](#getholidays--string)
+    - [setHolidays() => void](#setholidays--void)
+    - [getHolidayFormat() => string](#getholidayformat--string)
+    - [setHolidayFormat() => void](#setholidayformat--void)
+    - [getWorkingWeekdays() => [number]](#getworkingweekdays--number)
+    - [setWorkingWeekdays() => void](#setworkingweekdays--void)
   - [Local Development and Contributing](#local-development-and-contributing)
 
 ## Getting Started
@@ -74,13 +80,13 @@ Check if the date is a holiday. Returns **true** or **false**
 ```javascript
 // Add holidays to plugin options
 const options = {
-  holidays: ['2020-12-25'],
-  holidayFormat: 'YYYY-MM-DD',
+  holidays: [`2020-12-25`],
+  holidayFormat: `YYYY-MM-DD`,
 };
 dayjs.extend(businessDays, options);
 
 // Christmas day is a Friday
-dayjs('2020-12-25').isHoliday(); // returns true
+dayjs(`2020-12-25`).isHoliday(); // returns true
 ```
 
 ### isBusinessDay() => Boolean
@@ -89,10 +95,10 @@ Check if the date is a business day. Returns **true** or **false**
 
 ```javascript
 // Christmas day is a Friday
-dayjs('2020-12-25').isBusinessDay(); // returns true
+dayjs(`2020-12-25`).isBusinessDay(); // returns true
 
 // Boxing day is a Saturday
-dayjs('2020-12-26').isBusinessDay(); // returns false
+dayjs(`2020-12-26`).isBusinessDay(); // returns false
 ```
 
 ### businessDaysAdd(number) => Day.js Object
@@ -102,7 +108,7 @@ dayjs('2020-12-26').isBusinessDay(); // returns false
 Adds the `number` of Business Days to the current date. Returns the new date as a **Day.js object**
 
 ```javascript
-dayjs('2020-12-25').businessDaysAdd(3).format('DD/MM/YYYY'); // returns 30/12/2020
+dayjs(`2020-12-25`).businessDaysAdd(3).format(`DD/MM/YYYY`); // returns 30/12/2020
 ```
 
 ### businessDaysSubtract(number) => Day.js Object
@@ -112,7 +118,7 @@ dayjs('2020-12-25').businessDaysAdd(3).format('DD/MM/YYYY'); // returns 30/12/20
 Subtracts the `number` of Business Days from the current date. Returns the new date as a **Day.js object**
 
 ```javascript
-dayjs('2020-12-30').businessDaysSubtract(3).format('DD/MM/YYYY'); // returns 25/12/2020
+dayjs(`2020-12-30`).businessDaysSubtract(3).format(`DD/MM/YYYY`); // returns 25/12/2020
 ```
 
 ### businessDiff(date) => Number
@@ -122,8 +128,8 @@ dayjs('2020-12-30').businessDaysSubtract(3).format('DD/MM/YYYY'); // returns 25/
 Calculates the number of business days between a Day.js date and `date`. Returns the difference as a **positive or negative number**.
 
 ```javascript
-dayjs('2020-12-25').businessDiff(dayjs('2020-12-30')); // returns -5
-dayjs('2020-12-30').businessDiff(dayjs('2020-12-25')); // returns 5
+dayjs(`2020-12-25`).businessDiff(dayjs(`2020-12-30`)); // returns -5
+dayjs(`2020-12-30`).businessDiff(dayjs(`2020-12-25`)); // returns 5
 ```
 
 ### nextBusinessDay() => Day.js Object
@@ -132,7 +138,7 @@ Calculates the next Business Day. Returns a **Day.js object**
 
 ```javascript
 // 25th December 2020 is a Friday. Next business day is Monday 28th December.
-dayjs('2020-12-25').nextBusinessDay().format('DD/MM/YYYY'); // returns 28/12/2020
+dayjs(`2020-12-25`).nextBusinessDay().format(`DD/MM/YYYY`); // returns 28/12/2020
 ```
 
 ### prevBusinessDay() => Day.js Object
@@ -141,7 +147,7 @@ Calculates the previous Business Day. Returns a **Day.js object**
 
 ```javascript
 // 28th December 2020 is a Monday. Previous business day is Friday 25th December.
-dayjs('2020-12-28').prevBusinessDay().format('DD/MM/YYYY'); // returns 25/12/2020
+dayjs(`2020-12-28`).prevBusinessDay().format(`DD/MM/YYYY`); // returns 25/12/2020
 ```
 
 ### businessDaysInMonth() => [Day.js Object]
@@ -149,8 +155,8 @@ dayjs('2020-12-28').prevBusinessDay().format('DD/MM/YYYY'); // returns 25/12/202
 Calculates all of the business days in a given month. Returns an array of **Day.js objects**
 
 ```javascript
-dayjs('2020-12-25').businessDaysInMonth();
-// returns equivalent of [dayjs('2020-12-01'), dayjs('2020-12-02'), ...]
+dayjs(`2020-12-25`).businessDaysInMonth();
+// returns equivalent of [dayjs(`2020-12-01`), dayjs(`2020-12-02`), ...]
 ```
 
 ### lastBusinessDayOfMonth() => Day.js Object
@@ -159,7 +165,7 @@ Calculates the last Business Day of the month. Returns a **Day.js object**
 
 ```javascript
 // 30th September 2021 is a Thursday and is the last business day of the month.
-dayjs('2021-09-01').lastBusinessDayOfMonth().format('DD/MM/YYYY'); // returns 30/09/2021
+dayjs(`2021-09-01`).lastBusinessDayOfMonth().format(`DD/MM/YYYY`); // returns 30/09/2021
 ```
 
 ### businessWeeksInMonth() => [[Day.js Object]]
@@ -167,15 +173,75 @@ dayjs('2021-09-01').lastBusinessDayOfMonth().format('DD/MM/YYYY'); // returns 30
 Calculates all of the business weeks and days in a given month. Returns an two dimensional array of **Day.js objects**
 
 ```javascript
-dayjs('2020-12-25').businessWeeksInMonth();
+dayjs(`2020-12-25`).businessWeeksInMonth();
 // returns equivalent of
 // [
-//   [dayjs('2020-12-01'), dayjs('2020-12-02'), ...],
-//   [dayjs('2020-12-07'), dayjs('2020-12-08'), ...],
+//   [dayjs(`2020-12-01`), dayjs(`2020-12-02`), ...],
+//   [dayjs(`2020-12-07`), dayjs(`2020-12-08`), ...],
 //   ...
 // ]
 ```
 
+### getHolidays() => [string]
+
+Returns an array of **strings** representing the currently set holidays
+
+```javascript
+const options = {
+  holidays: [`2020-12-25`],
+  holidayFormat: `YYYY-MM-DD`,
+};
+dayjs.extend(businessDays, options);
+
+dayjs.getHolidays(); // returns [ `2020-12-25` ]
+```
+
+### setHolidays() => void
+
+Sets the holiday list to the given array of **strings**
+
+```javascript
+dayjs.setHolidays([ `2020-12-25`, `2021-01-01` ]);
+```
+
+### getHolidayFormat() => string
+
+Returns a **string** representing the currently expected holiday format
+
+```javascript
+const options = {
+  holidays: [`2020-12-25`],
+  holidayFormat: `YYYY-MM-DD`,
+};
+dayjs.extend(businessDays, options);
+
+dayjs.getHolidaysFormat(); // returns [ `YYYY-MM-DD` ]
+```
+
+### setHolidayFormat() => void
+
+Sets the holiday list to the given a **string**
+
+```javascript
+dayjs.setHolidayFormat(`MM-DD-YYYY`);
+```
+
+### getWorkingWeekdays() => [number]
+
+Returns an array of **numbers** representing the current days fo the week that are considered business days
+
+```javascript
+dayjs.getWorkingWeekdays(); // returns [ 1, 2, 3, 4, 5 ]
+```
+
+### setWorkingWeekdays() => void
+
+Sets the days of the week that are considered business days to the given array of **numbers** where 0 is Sunday and 6 is Saturday
+
+```javascript
+dayjs.setWorkingWeekdays([ 0, 3, 4, 5 ]);
+```
+
 ## Local Development and Contributing
 
 I am more than happy to accept PRs for bugs, improvements or new features.