diff --git a/cli/js/lib.deno.ns.d.ts b/cli/js/lib.deno.ns.d.ts
index 9813b11fbd3273..7a04776822e75a 100644
--- a/cli/js/lib.deno.ns.d.ts
+++ b/cli/js/lib.deno.ns.d.ts
@@ -1316,15 +1316,15 @@ declare namespace Deno {
     /** The last modification time of the file. This corresponds to the `mtime`
      * field from `stat` on Linux/Mac OS and `ftLastWriteTime` on Windows. This
      * may not be available on all platforms. */
-    modified: number | null;
+    mtime: Date | null;
     /** The last access time of the file. This corresponds to the `atime`
      * field from `stat` on Unix and `ftLastAccessTime` on Windows. This may not
      * be available on all platforms. */
-    accessed: number | null;
+    atime: Date | null;
     /** The creation time of the file. This corresponds to the `birthtime`
-     * field from `stat` on Mac/BSD and `ftCreationTime` on Windows. This may not
-     * be available on all platforms. */
-    created: number | null;
+     * field from `stat` on Mac/BSD and `ftCreationTime` on Windows. This may
+     * not be available on all platforms. */
+    birthtime: Date | null;
     /** ID of the device containing the file.
      *
      * _Linux/Mac OS only._ */
diff --git a/cli/js/ops/fs/stat.ts b/cli/js/ops/fs/stat.ts
index 6b7e5ea93098b8..7f28614d2419f6 100644
--- a/cli/js/ops/fs/stat.ts
+++ b/cli/js/ops/fs/stat.ts
@@ -4,9 +4,9 @@ import { build } from "../../build.ts";
 
 export interface FileInfo {
   size: number;
-  modified: number | null;
-  accessed: number | null;
-  created: number | null;
+  mtime: Date | null;
+  atime: Date | null;
+  birthtime: Date | null;
   dev: number | null;
   ino: number | null;
   mode: number | null;
@@ -26,9 +26,9 @@ export interface StatResponse {
   isDirectory: boolean;
   isSymlink: boolean;
   size: number;
-  modified: number;
-  accessed: number;
-  created: number;
+  mtime: number | null;
+  atime: number | null;
+  birthtime: number | null;
   // Null for stat(), but exists for readdir().
   name: string | null;
   // Unix only members
@@ -51,9 +51,9 @@ export function parseFileInfo(response: StatResponse): FileInfo {
     isDirectory: response.isDirectory,
     isSymlink: response.isSymlink,
     size: response.size,
-    modified: response.modified ? response.modified : null,
-    accessed: response.accessed ? response.accessed : null,
-    created: response.created ? response.created : null,
+    mtime: response.mtime != null ? new Date(response.mtime) : null,
+    atime: response.atime != null ? new Date(response.atime) : null,
+    birthtime: response.birthtime != null ? new Date(response.birthtime) : null,
     // Only non-null if on Unix
     dev: isUnix ? response.dev : null,
     ino: isUnix ? response.ino : null,
diff --git a/cli/js/tests/stat_test.ts b/cli/js/tests/stat_test.ts
index e4f4ae61eb604b..70ec5dc2e7caef 100644
--- a/cli/js/tests/stat_test.ts
+++ b/cli/js/tests/stat_test.ts
@@ -1,21 +1,31 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 import { unitTest, assert, assertEquals } from "./test_util.ts";
 
-// TODO Add tests for modified, accessed, and created fields once there is a way
-// to create temp files.
-unitTest({ perms: { read: true } }, function statSyncSuccess(): void {
-  const packageInfo = Deno.statSync("README.md");
-  assert(packageInfo.isFile);
-  assert(!packageInfo.isSymlink);
-
-  const modulesInfo = Deno.statSync("cli/tests/symlink_to_subdir");
-  assert(modulesInfo.isDirectory);
-  assert(!modulesInfo.isSymlink);
-
-  const testsInfo = Deno.statSync("cli/tests");
-  assert(testsInfo.isDirectory);
-  assert(!testsInfo.isSymlink);
-});
+unitTest(
+  { perms: { read: true, write: true } },
+  function statSyncSuccess(): void {
+    const packageInfo = Deno.statSync("README.md");
+    assert(packageInfo.isFile);
+    assert(!packageInfo.isSymlink);
+
+    const modulesInfo = Deno.statSync("cli/tests/symlink_to_subdir");
+    assert(modulesInfo.isDirectory);
+    assert(!modulesInfo.isSymlink);
+
+    const testsInfo = Deno.statSync("cli/tests");
+    assert(testsInfo.isDirectory);
+    assert(!testsInfo.isSymlink);
+
+    const tempFile = Deno.makeTempFileSync();
+    const tempInfo = Deno.statSync(tempFile);
+    const now = Date.now();
+    assert(tempInfo.atime !== null && now - tempInfo.atime.valueOf() < 1000);
+    assert(tempInfo.mtime !== null && now - tempInfo.mtime.valueOf() < 1000);
+    assert(
+      tempInfo.birthtime === null || now - tempInfo.birthtime.valueOf() < 1000
+    );
+  }
+);
 
 unitTest({ perms: { read: false } }, function statSyncPerm(): void {
   let caughtError = false;
@@ -83,21 +93,32 @@ unitTest({ perms: { read: true } }, function lstatSyncNotFound(): void {
   assertEquals(badInfo, undefined);
 });
 
-unitTest({ perms: { read: true } }, async function statSuccess(): Promise<
-  void
-> {
-  const packageInfo = await Deno.stat("README.md");
-  assert(packageInfo.isFile);
-  assert(!packageInfo.isSymlink);
-
-  const modulesInfo = await Deno.stat("cli/tests/symlink_to_subdir");
-  assert(modulesInfo.isDirectory);
-  assert(!modulesInfo.isSymlink);
-
-  const testsInfo = await Deno.stat("cli/tests");
-  assert(testsInfo.isDirectory);
-  assert(!testsInfo.isSymlink);
-});
+unitTest(
+  { perms: { read: true, write: true } },
+  async function statSuccess(): Promise<void> {
+    const packageInfo = await Deno.stat("README.md");
+    assert(packageInfo.isFile);
+    assert(!packageInfo.isSymlink);
+
+    const modulesInfo = await Deno.stat("cli/tests/symlink_to_subdir");
+    assert(modulesInfo.isDirectory);
+    assert(!modulesInfo.isSymlink);
+
+    const testsInfo = await Deno.stat("cli/tests");
+    assert(testsInfo.isDirectory);
+    assert(!testsInfo.isSymlink);
+
+    const tempFile = await Deno.makeTempFile();
+    const tempInfo = await Deno.stat(tempFile);
+    const now = Date.now();
+    assert(tempInfo.atime !== null && now - tempInfo.atime.valueOf() < 1000);
+    assert(tempInfo.mtime !== null && now - tempInfo.mtime.valueOf() < 1000);
+
+    assert(
+      tempInfo.birthtime === null || now - tempInfo.birthtime.valueOf() < 1000
+    );
+  }
+);
 
 unitTest({ perms: { read: false } }, async function statPerm(): Promise<void> {
   let caughtError = false;
diff --git a/cli/js/tests/utime_test.ts b/cli/js/tests/utime_test.ts
index a81600e540429a..63727ae6235353 100644
--- a/cli/js/tests/utime_test.ts
+++ b/cli/js/tests/utime_test.ts
@@ -4,9 +4,9 @@ import { unitTest, assert } from "./test_util.ts";
 // Allow 10 second difference.
 // Note this might not be enough for FAT (but we are not testing on such fs).
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
-function assertFuzzyTimestampEquals(t1: any, t2: number): void {
-  assert(typeof t1 === "number");
-  assert(Math.abs(t1 - t2) < 10);
+function assertFuzzyTimestampEquals(t1: Date | null, t2: Date): void {
+  assert(t1 instanceof Date);
+  assert(Math.abs(t1.valueOf() - t2.valueOf()) < 10_000);
 }
 
 unitTest(
@@ -23,8 +23,8 @@ unitTest(
     Deno.utimeSync(filename, atime, mtime);
 
     const fileInfo = Deno.statSync(filename);
-    assertFuzzyTimestampEquals(fileInfo.accessed, atime);
-    assertFuzzyTimestampEquals(fileInfo.modified, mtime);
+    assertFuzzyTimestampEquals(fileInfo.atime, new Date(atime * 1000));
+    assertFuzzyTimestampEquals(fileInfo.mtime, new Date(mtime * 1000));
   }
 );
 
@@ -38,8 +38,8 @@ unitTest(
     Deno.utimeSync(testDir, atime, mtime);
 
     const dirInfo = Deno.statSync(testDir);
-    assertFuzzyTimestampEquals(dirInfo.accessed, atime);
-    assertFuzzyTimestampEquals(dirInfo.modified, mtime);
+    assertFuzzyTimestampEquals(dirInfo.atime, new Date(atime * 1000));
+    assertFuzzyTimestampEquals(dirInfo.mtime, new Date(mtime * 1000));
   }
 );
 
@@ -48,13 +48,13 @@ unitTest(
   function utimeSyncDateSuccess(): void {
     const testDir = Deno.makeTempDirSync();
 
-    const atime = 1000;
-    const mtime = 50000;
-    Deno.utimeSync(testDir, new Date(atime * 1000), new Date(mtime * 1000));
+    const atime = new Date(1000_000);
+    const mtime = new Date(50000_000);
+    Deno.utimeSync(testDir, atime, mtime);
 
     const dirInfo = Deno.statSync(testDir);
-    assertFuzzyTimestampEquals(dirInfo.accessed, atime);
-    assertFuzzyTimestampEquals(dirInfo.modified, mtime);
+    assertFuzzyTimestampEquals(dirInfo.atime, atime);
+    assertFuzzyTimestampEquals(dirInfo.mtime, mtime);
   }
 );
 
@@ -71,15 +71,8 @@ unitTest(
     Deno.utimeSync(filename, atime, mtime);
 
     const fileInfo = Deno.statSync(filename);
-    // atime and mtime must be scaled by a factor of 1000 to be recorded in seconds
-    assertFuzzyTimestampEquals(
-      fileInfo.accessed,
-      Math.trunc(atime.valueOf() / 1000)
-    );
-    assertFuzzyTimestampEquals(
-      fileInfo.modified,
-      Math.trunc(mtime.valueOf() / 1000)
-    );
+    assertFuzzyTimestampEquals(fileInfo.atime, atime);
+    assertFuzzyTimestampEquals(fileInfo.mtime, mtime);
   }
 );
 
@@ -95,8 +88,8 @@ unitTest(
     Deno.utimeSync(testDir, atime, mtime);
 
     const dirInfo = Deno.statSync(testDir);
-    assertFuzzyTimestampEquals(dirInfo.accessed, atime);
-    assertFuzzyTimestampEquals(dirInfo.modified, mtime);
+    assertFuzzyTimestampEquals(dirInfo.atime, new Date(atime * 1000));
+    assertFuzzyTimestampEquals(dirInfo.mtime, new Date(mtime * 1000));
   }
 );
 
@@ -148,8 +141,8 @@ unitTest(
     await Deno.utime(filename, atime, mtime);
 
     const fileInfo = Deno.statSync(filename);
-    assertFuzzyTimestampEquals(fileInfo.accessed, atime);
-    assertFuzzyTimestampEquals(fileInfo.modified, mtime);
+    assertFuzzyTimestampEquals(fileInfo.atime, new Date(atime * 1000));
+    assertFuzzyTimestampEquals(fileInfo.mtime, new Date(mtime * 1000));
   }
 );
 
@@ -163,8 +156,8 @@ unitTest(
     await Deno.utime(testDir, atime, mtime);
 
     const dirInfo = Deno.statSync(testDir);
-    assertFuzzyTimestampEquals(dirInfo.accessed, atime);
-    assertFuzzyTimestampEquals(dirInfo.modified, mtime);
+    assertFuzzyTimestampEquals(dirInfo.atime, new Date(atime * 1000));
+    assertFuzzyTimestampEquals(dirInfo.mtime, new Date(mtime * 1000));
   }
 );
 
@@ -173,13 +166,13 @@ unitTest(
   async function utimeDateSuccess(): Promise<void> {
     const testDir = Deno.makeTempDirSync();
 
-    const atime = 1000;
-    const mtime = 50000;
-    await Deno.utime(testDir, new Date(atime * 1000), new Date(mtime * 1000));
+    const atime = new Date(100_000);
+    const mtime = new Date(5000_000);
+    await Deno.utime(testDir, atime, mtime);
 
     const dirInfo = Deno.statSync(testDir);
-    assertFuzzyTimestampEquals(dirInfo.accessed, atime);
-    assertFuzzyTimestampEquals(dirInfo.modified, mtime);
+    assertFuzzyTimestampEquals(dirInfo.atime, atime);
+    assertFuzzyTimestampEquals(dirInfo.mtime, mtime);
   }
 );
 
@@ -197,15 +190,8 @@ unitTest(
     await Deno.utime(filename, atime, mtime);
 
     const fileInfo = Deno.statSync(filename);
-    // The dates must be scaled by a factored of 1000 to make them seconds
-    assertFuzzyTimestampEquals(
-      fileInfo.accessed,
-      Math.trunc(atime.valueOf() / 1000)
-    );
-    assertFuzzyTimestampEquals(
-      fileInfo.modified,
-      Math.trunc(mtime.valueOf() / 1000)
-    );
+    assertFuzzyTimestampEquals(fileInfo.atime, atime);
+    assertFuzzyTimestampEquals(fileInfo.mtime, mtime);
   }
 );
 
diff --git a/cli/op_error.rs b/cli/op_error.rs
index a687eed2b7c71f..f319ec90606144 100644
--- a/cli/op_error.rs
+++ b/cli/op_error.rs
@@ -18,6 +18,7 @@ use crate::import_map::ImportMapError;
 use deno_core::ErrBox;
 use deno_core::ModuleResolutionError;
 use rustyline::error::ReadlineError;
+use serde_json;
 use std::env::VarError;
 use std::error::Error;
 use std::fmt;
diff --git a/cli/ops/fs.rs b/cli/ops/fs.rs
index 5ab53481092df2..84ac4ed51371d1 100644
--- a/cli/ops/fs.rs
+++ b/cli/ops/fs.rs
@@ -12,7 +12,9 @@ use deno_core::ZeroCopyBuf;
 use futures::future::FutureExt;
 use std::convert::From;
 use std::env::{current_dir, set_current_dir, temp_dir};
+use std::io;
 use std::path::{Path, PathBuf};
+use std::time::SystemTime;
 use std::time::UNIX_EPOCH;
 
 use rand::{thread_rng, Rng};
@@ -441,14 +443,19 @@ fn op_copy_file(
   })
 }
 
-macro_rules! to_seconds {
-  ($time:expr) => {{
-    // Unwrap is safe here as if the file is before the unix epoch
-    // something is very wrong.
-    $time
-      .and_then(|t| Ok(t.duration_since(UNIX_EPOCH).unwrap().as_secs()))
-      .unwrap_or(0)
-  }};
+fn to_msec(maybe_time: Result<SystemTime, io::Error>) -> serde_json::Value {
+  match maybe_time {
+    Ok(time) => {
+      let msec = time
+        .duration_since(UNIX_EPOCH)
+        .map(|t| t.as_secs_f64() * 1000f64)
+        .unwrap_or_else(|err| err.duration().as_secs_f64() * -1000f64);
+      serde_json::Number::from_f64(msec)
+        .map(serde_json::Value::Number)
+        .unwrap_or(serde_json::Value::Null)
+    }
+    Err(_) => serde_json::Value::Null,
+  }
 }
 
 #[inline(always)]
@@ -477,10 +484,10 @@ fn get_stat_json(
     "isDirectory": metadata.is_dir(),
     "isSymlink": metadata.file_type().is_symlink(),
     "size": metadata.len(),
-    // In seconds. Available on both Unix or Windows.
-    "modified":to_seconds!(metadata.modified()),
-    "accessed":to_seconds!(metadata.accessed()),
-    "created":to_seconds!(metadata.created()),
+    // In milliseconds, like JavaScript. Available on both Unix or Windows.
+    "mtime": to_msec(metadata.modified()),
+    "atime": to_msec(metadata.accessed()),
+    "birthtime": to_msec(metadata.created()),
     // Following are only valid under Unix.
     "dev": usm!(dev),
     "ino": usm!(ino),