diff --git a/packages/nodes-base/nodes/Todoist/GenericFunctions.ts b/packages/nodes-base/nodes/Todoist/GenericFunctions.ts
index bd09118daee98..a8658a42db122 100644
--- a/packages/nodes-base/nodes/Todoist/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Todoist/GenericFunctions.ts
@@ -12,6 +12,12 @@ import {
 	IDataObject, NodeApiError,
 } from 'n8n-workflow';
 
+export function FormatDueDatetime(ISOString: string): string {
+	// Assuming that the problem with incorrect date format was caused by milliseconds
+	// Replacing the last 5 characters of ISO-formatted string with just Z char
+	return ISOString.replace(new RegExp('.000Z$'), 'Z');
+}
+
 export async function todoistApiRequest(
 	this:
 		| IHookFunctions
diff --git a/packages/nodes-base/nodes/Todoist/Todoist.node.ts b/packages/nodes-base/nodes/Todoist/Todoist.node.ts
index a4ebc6fe2dc9a..edc5c4fcce374 100644
--- a/packages/nodes-base/nodes/Todoist/Todoist.node.ts
+++ b/packages/nodes-base/nodes/Todoist/Todoist.node.ts
@@ -13,6 +13,7 @@ import {
 
 import {
 	todoistApiRequest,
+	FormatDueDatetime,
 } from './GenericFunctions';
 
 interface IBodyCreateTask {
@@ -276,6 +277,13 @@ export class Todoist implements INodeType {
 						default: '',
 						description: 'Human defined task due date (ex.: “next Monday”, “Tomorrow”). Value is set using local (not UTC) time.',
 					},
+					{
+						displayName: 'Due String Locale',
+						name: 'dueLang',
+						type: 'string',
+						default: '',
+						description: '2-letter code specifying language in case due_string is not written in English.',
+					},
 					{
 						displayName: 'Priority',
 						name: 'priority',
@@ -357,7 +365,7 @@ export class Todoist implements INodeType {
 						],
 						operation: [
 							'getAll',
-						],
+						], 
 					},
 				},
 				options: [
@@ -449,6 +457,13 @@ export class Todoist implements INodeType {
 						default: '',
 						description: 'Human defined task due date (ex.: “next Monday”, “Tomorrow”). Value is set using local (not UTC) time.',
 					},
+					{
+						displayName: 'Due String Locale',
+						name: 'dueLang',
+						type: 'string',
+						default: '',
+						description: '2-letter code specifying language in case due_string is not written in English.',
+					},
 					{
 						displayName: 'Labels',
 						name: 'labels',
@@ -573,13 +588,17 @@ export class Todoist implements INodeType {
 						}
 
 						if (options.dueDateTime) {
-							body.due_datetime = options.dueDateTime as string;
+							body.due_datetime = FormatDueDatetime(options.dueDateTime as string);
 						}
 
 						if (options.dueString) {
 							body.due_string = options.dueString as string;
 						}
 
+						if (options.dueLang) {
+							body.due_lang = options.dueLang as string;
+						}
+
 						if (labels !== undefined && labels.length !== 0) {
 							body.label_ids = labels;
 						}
@@ -670,13 +689,17 @@ export class Todoist implements INodeType {
 						}
 
 						if (updateFields.dueDateTime) {
-							body.due_datetime = updateFields.dueDateTime as string;
+							body.due_datetime = FormatDueDatetime(updateFields.dueDateTime as string);
 						}
 
 						if (updateFields.dueString) {
 							body.due_string = updateFields.dueString as string;
 						}
 
+						if (updateFields.dueLang) {
+							body.due_lang = updateFields.dueLang as string;
+						}
+
 						if (updateFields.labels !== undefined &&
 							Array.isArray(updateFields.labels) &&
 							updateFields.labels.length !== 0) {