diff --git a/types/luxon/package.json b/types/luxon/package.json
index cf3994cae77fdc..470a668c116ac0 100644
--- a/types/luxon/package.json
+++ b/types/luxon/package.json
@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "@types/luxon",
-    "version": "3.4.9999",
+    "version": "3.6.9999",
     "projects": [
         "https://github.com/moment/luxon#readme"
     ],
diff --git a/types/luxon/src/datetime.d.ts b/types/luxon/src/datetime.d.ts
index fbb66fce3ea373..f7ef8b2f24e2eb 100644
--- a/types/luxon/src/datetime.d.ts
+++ b/types/luxon/src/datetime.d.ts
@@ -5,6 +5,7 @@ import {
     StringUnitLength,
     ToISOFormat,
     ToISOTimeDurationOptions,
+    WeekSettings,
     ZoneOptions,
 } from "../index";
 import { CanBeInvalid, DefaultValidity, IfValid, Invalid, Valid } from "./_util";
@@ -12,6 +13,8 @@ import { Duration, DurationLike, DurationUnits } from "./duration";
 import { Interval } from "./interval";
 import { Zone } from "./zone";
 
+export {}; // Turn off default exports
+
 export type DateTimeUnit = "year" | "quarter" | "month" | "week" | "day" | "hour" | "minute" | "second" | "millisecond";
 export type ToRelativeUnit = "years" | "quarters" | "months" | "weeks" | "days" | "hours" | "minutes" | "seconds";
 
@@ -304,6 +307,7 @@ export interface LocaleOptions {
     locale?: string | undefined;
     outputCalendar?: CalendarSystem | undefined;
     numberingSystem?: NumberingSystem | undefined;
+    weekSettings?: WeekSettings | undefined;
 }
 
 export type ResolvedLocaleOptions = Required<LocaleOptions>;
@@ -397,6 +401,11 @@ export interface ExplainedFormat {
 
 export type DateTimeMaybeValid = CanBeInvalid extends true ? (DateTime<Valid> | DateTime<Invalid>) : DateTime;
 
+declare const tokenParserBrand: unique symbol;
+export interface TokenParser {
+    [tokenParserBrand]: true;
+}
+
 /**
  * A DateTime is an immutable data structure representing a specific date and time and accompanying methods.
  * It contains class and instance methods for creating, parsing, interrogating, transforming, and formatting them.
@@ -1616,6 +1625,25 @@ export class DateTime<IsValid extends boolean = DefaultValidity> {
      */
     static fromStringExplain(text: string, fmt: string, options?: DateTimeOptions): ExplainedFormat;
 
+    /**
+     * Build a parser for fmt using the given locale. This parser can be passed to {@link DateTime.fromFormatParser} to a parse a date in this format. This can be used to optimize cases where many dates need to be parsed in a specific format.
+     *
+     * @param fmt - the format the string is expected to be in (see description)
+     * @param options - the Locale options
+     */
+    static buildFormatParser(fmt: string, options?: LocaleOptions): TokenParser;
+
+    /**
+     * Create a DateTime from an input string and format parser.
+     *
+     * The format parser must have been created with the same locale as this call.
+     *
+     * @param text the string to parse
+     * @param formatParser - parser from {@link DateTime.buildFormatParser}
+     * @param opts options taken by fromFormat()
+     */
+    static fromFormatParser(text: string, formatParser: TokenParser, opts?: DateTimeOptions): DateTimeMaybeValid;
+
     // FORMAT PRESETS
 
     /**
diff --git a/types/luxon/src/interval.d.ts b/types/luxon/src/interval.d.ts
index 8956b437fc91c5..2847bfe5b646ef 100644
--- a/types/luxon/src/interval.d.ts
+++ b/types/luxon/src/interval.d.ts
@@ -100,6 +100,11 @@ export class Interval<IsValid extends boolean = DefaultValidity> {
      */
     get end(): IfValid<DateTime<Valid>, null, IsValid>;
 
+    /**
+     * Returns the last DateTime included in the interval (since end is not part of the interval)
+     */
+    get lastDateTime(): IfValid<DateTime<Valid>, null, IsValid>;
+
     /**
      * Returns whether this Interval's end is at least its start, meaning that the Interval isn't 'backwards'.
      */
diff --git a/types/luxon/test/luxon-tests.module.ts b/types/luxon/test/luxon-tests.module.ts
index cc767ecd8d2680..37305394c9091b 100644
--- a/types/luxon/test/luxon-tests.module.ts
+++ b/types/luxon/test/luxon-tests.module.ts
@@ -32,6 +32,8 @@ DateTime.utc(2019, { locale: "en-GB" }, 5);
 DateTime.isDateTime(0 as unknown); // $ExpectType boolean
 DateTime.parseFormatForOpts(DateTime.DATETIME_FULL); // $ExpectType string | null
 DateTime.expandFormat("d", { locale: "en-US" }); // $ExpectType string
+const parser = DateTime.buildFormatParser("dd/MM/yyyy", { locale: "en-US" });
+DateTime.fromFormatParser("22/11/1948", parser);
 // @ts-expect-error
 new DateTime();