possibility for up to 12 columns

src/calendar.ts

@@ -19,7 +19,7 @@ export class Calendar extends LPCore {
     months.className = style.containerMonths;
 
     if (style[`columns${this.options.numberOfColumns}`]) {
-      months.classList.remove(style.columns2, style.columns3, style.columns4);
+      months.classList.remove(style.columns2, style.columns3, style.columns4, style.columns5, style.columns6, style.columns7, style.columns8, style.columns9, style.columns10, style.columns11, style.columns12);
       months.classList.add(style[`columns${this.options.numberOfColumns}`]);
     }
 

src/scss/main.scss

@@ -69,6 +69,38 @@
       &.columns-4 {
         width: calc((var(--litepicker-month-width) * 4) + 40px);
       }
+
+      &.columns-5 {
+        width: calc((var(--litepicker-month-width) * 5) + 50px);
+      }
+
+      &.columns-6 {
+        width: calc((var(--litepicker-month-width) * 6) + 60px);
+      }
+
+      &.columns-7 {
+        width: calc((var(--litepicker-month-width) * 7) + 70px);
+      }
+
+      &.columns-8 {
+        width: calc((var(--litepicker-month-width) * 8) + 80px);
+      }
+
+      &.columns-9 {
+        width: calc((var(--litepicker-month-width) * 9) + 90px);
+      }
+
+      &.columns-10 {
+        width: calc((var(--litepicker-month-width) * 10) + 100px);
+      }
+
+      &.columns-11 {
+        width: calc((var(--litepicker-month-width) * 11) + 110px);
+      }
+
+      &.columns-12 {
+        width: calc((var(--litepicker-month-width) * 12) + 120px);
+      }
 
       &.split-view {
         .month-item {

src/scss/main.scss.d.ts

@@ -5,6 +5,14 @@ export const containerMonths: string;
 export const columns2: string;
 export const columns3: string;
 export const columns4: string;
+export const columns5: string;
+export const columns6: string;
+export const columns7: string;
+export const columns8: string;
+export const columns9: string;
+export const columns10: string;
+export const columns11: string;
+export const columns12: string;
 export const splitView: string;
 export const monthItemHeader: string;
 export const buttonPreviousMonth: string;