diff --git a/js/js.libraries/src/core/date.kt b/js/js.libraries/src/core/date.kt
index 449568fffd2..1a3a4aa6dab 100644
--- a/js/js.libraries/src/core/date.kt
+++ b/js/js.libraries/src/core/date.kt
@@ -4,5 +4,129 @@ package kotlin.js
  * Exposes the [Date API](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date) to Kotlin.
  */
 public external class Date() {
+    public constructor(milliseconds: Number)
+
+    public constructor(dateString: String)
+
+    public constructor(year: Int, month: Int)
+
+    public constructor(year: Int, month: Int, day: Int)
+
+    public constructor(year: Int, month: Int, day: Int, hour: Int)
+
+    public constructor(year: Int, month: Int, day: Int, hour: Int, minute: Int)
+
+    public constructor(year: Int, month: Int, day: Int, hour: Int, minute: Int, second: Int)
+
+    public constructor(year: Int, month: Int, day: Int, hour: Int, minute: Int, second: Int, millisecond: Number)
+
+    public fun getDate(): Int
+
+    public fun getDay(): Int
+
+    public fun getFullYear(): Int
+
+    public fun getHours(): Int
+
+    public fun getMilliseconds(): Int
+
+    public fun getMinutes(): Int
+
+    public fun getMonth(): Int
+
+    public fun getSeconds(): Int
+
     public fun getTime(): Double
+
+    public fun getTimezoneOffset(): Int
+
+    public fun getUTCDate(): Int
+
+    public fun getUTCDay(): Int
+
+    public fun getUTCFullYear(): Int
+
+    public fun getUTCHours(): Int
+
+    public fun getUTCMilliseconds(): Int
+
+    public fun getUTCMinutes(): Int
+
+    public fun getUTCMonth(): Int
+
+    public fun getUTCSeconds(): Int
+
+    public fun toDateString(): String
+
+    public fun toISOString(): String
+
+    public fun toJSON(): Json
+
+    public fun toLocaleDateString(locales: Array<String> = definedExternally, options: LocaleOptions = definedExternally): String
+
+    public fun toLocaleDateString(locales: String, options: LocaleOptions = definedExternally): String
+
+    public fun toLocaleString(locales: Array<String> = definedExternally, options: LocaleOptions = definedExternally): String
+
+    public fun toLocaleString(locales: String, options: LocaleOptions = definedExternally): String
+
+    public fun toLocaleTimeString(locales: Array<String> = definedExternally, options: LocaleOptions = definedExternally): String
+
+    public fun toLocaleTimeString(locales: String, options: LocaleOptions = definedExternally): String
+
+    public fun toTimeString(): String
+
+    public fun toUTCString(): String
+
+    public companion object {
+        public fun now(): Double
+
+        public fun parse(dateString: String): Double
+
+        public fun UTC(year: Int, month: Int): Double
+
+        public fun UTC(year: Int, month: Int, day: Int): Double
+
+        public fun UTC(year: Int, month: Int, day: Int, hour: Int): Double
+
+        public fun UTC(year: Int, month: Int, day: Int, hour: Int, minute: Int): Double
+
+        public fun UTC(year: Int, month: Int, day: Int, hour: Int, minute: Int, second: Int): Double
+
+        public fun UTC(year: Int, month: Int, day: Int, hour: Int, minute: Int, second: Int, millisecond: Number): Double
+    }
+
+    public interface LocaleOptions {
+        public var localeMatcher: String?
+
+        public var timeZone: String?
+
+        public var hour12: Boolean?
+
+        public var formatMatcher: String?
+
+        public var weekday: String?
+
+        public var era: String?
+
+        public var year: String?
+
+        public var month: String?
+
+        public var day: String?
+
+        public var hour: String?
+
+        public var minute: String?
+
+        public var second: String?
+
+        public var timeZoneName: String?
+    }
 }
+
+public inline fun dateLocaleOptions(init: Date.LocaleOptions.() -> Unit): Date.LocaleOptions {
+    val result = js("new Object()").unsafeCast<Date.LocaleOptions>()
+    init(result)
+    return result
+}
\ No newline at end of file