diff --git a/backend/chunker/chunker.go b/backend/chunker/chunker.go
index baf4656ed..1867dfc4a 100644
--- a/backend/chunker/chunker.go
+++ b/backend/chunker/chunker.go
@@ -1888,6 +1888,14 @@ func (f *Fs) DirMove(ctx context.Context, src fs.Fs, srcRemote, dstRemote string
 	return do(ctx, srcFs.base, srcRemote, dstRemote)
 }
 
+// DirSetModTime sets the directory modtime for dir
+func (f *Fs) DirSetModTime(ctx context.Context, dir string, modTime time.Time) error {
+	if do := f.base.Features().DirSetModTime; do != nil {
+		return do(ctx, dir, modTime)
+	}
+	return fs.ErrorNotImplemented
+}
+
 // CleanUp the trash in the Fs
 //
 // Implement this if you have a way of emptying the trash or
@@ -2548,6 +2556,7 @@ var (
 	_ fs.Copier          = (*Fs)(nil)
 	_ fs.Mover           = (*Fs)(nil)
 	_ fs.DirMover        = (*Fs)(nil)
+	_ fs.DirSetModTimer  = (*Fs)(nil)
 	_ fs.PutUncheckeder  = (*Fs)(nil)
 	_ fs.PutStreamer     = (*Fs)(nil)
 	_ fs.CleanUpper      = (*Fs)(nil)
diff --git a/backend/combine/combine.go b/backend/combine/combine.go
index 74384fb48..a6f61de77 100644
--- a/backend/combine/combine.go
+++ b/backend/combine/combine.go
@@ -965,6 +965,22 @@ func (f *Fs) MergeDirs(ctx context.Context, dirs []fs.Directory) error {
 	return do(ctx, uDirs)
 }
 
+// DirSetModTime sets the directory modtime for dir
+func (f *Fs) DirSetModTime(ctx context.Context, dir string, modTime time.Time) error {
+	u, uDir, err := f.findUpstream(dir)
+	if err != nil {
+		return err
+	}
+	if uDir == "" {
+		fs.Debugf(dir, "can't set modtime on upstream root. skipping.")
+		return nil
+	}
+	if do := u.f.Features().DirSetModTime; do != nil {
+		return do(ctx, uDir, modTime)
+	}
+	return fs.ErrorNotImplemented
+}
+
 // CleanUp the trash in the Fs
 //
 // Implement this if you have a way of emptying the trash or
@@ -1099,6 +1115,7 @@ var (
 	_ fs.PublicLinker    = (*Fs)(nil)
 	_ fs.PutUncheckeder  = (*Fs)(nil)
 	_ fs.MergeDirser     = (*Fs)(nil)
+	_ fs.DirSetModTimer  = (*Fs)(nil)
 	_ fs.CleanUpper      = (*Fs)(nil)
 	_ fs.OpenWriterAter  = (*Fs)(nil)
 	_ fs.FullObject      = (*Object)(nil)
diff --git a/backend/compress/compress.go b/backend/compress/compress.go
index b477512e7..aab41c6e3 100644
--- a/backend/compress/compress.go
+++ b/backend/compress/compress.go
@@ -927,6 +927,14 @@ func (f *Fs) DirMove(ctx context.Context, src fs.Fs, srcRemote, dstRemote string
 	return do(ctx, srcFs.Fs, srcRemote, dstRemote)
 }
 
+// DirSetModTime sets the directory modtime for dir
+func (f *Fs) DirSetModTime(ctx context.Context, dir string, modTime time.Time) error {
+	if do := f.Fs.Features().DirSetModTime; do != nil {
+		return do(ctx, dir, modTime)
+	}
+	return fs.ErrorNotImplemented
+}
+
 // CleanUp the trash in the Fs
 //
 // Implement this if you have a way of emptying the trash or
@@ -1497,6 +1505,7 @@ var (
 	_ fs.Copier          = (*Fs)(nil)
 	_ fs.Mover           = (*Fs)(nil)
 	_ fs.DirMover        = (*Fs)(nil)
+	_ fs.DirSetModTimer  = (*Fs)(nil)
 	_ fs.PutStreamer     = (*Fs)(nil)
 	_ fs.CleanUpper      = (*Fs)(nil)
 	_ fs.UnWrapper       = (*Fs)(nil)
diff --git a/backend/crypt/crypt.go b/backend/crypt/crypt.go
index 54b1335dc..270e9ff6b 100644
--- a/backend/crypt/crypt.go
+++ b/backend/crypt/crypt.go
@@ -520,6 +520,15 @@ func (f *Fs) Mkdir(ctx context.Context, dir string) error {
 	return f.Fs.Mkdir(ctx, f.cipher.EncryptDirName(dir))
 }
 
+// DirSetModTime sets the directory modtime for dir
+func (f *Fs) DirSetModTime(ctx context.Context, dir string, modTime time.Time) error {
+	do := f.Fs.Features().DirSetModTime
+	if do == nil {
+		return fs.ErrorNotImplemented
+	}
+	return do(ctx, f.cipher.EncryptDirName(dir), modTime)
+}
+
 // Rmdir removes the directory (container, bucket) if empty
 //
 // Return an error if it doesn't exist or isn't empty
@@ -1207,6 +1216,7 @@ var (
 	_ fs.Abouter         = (*Fs)(nil)
 	_ fs.Wrapper         = (*Fs)(nil)
 	_ fs.MergeDirser     = (*Fs)(nil)
+	_ fs.DirSetModTimer  = (*Fs)(nil)
 	_ fs.DirCacheFlusher = (*Fs)(nil)
 	_ fs.ChangeNotifier  = (*Fs)(nil)
 	_ fs.PublicLinker    = (*Fs)(nil)
diff --git a/backend/hasher/hasher.go b/backend/hasher/hasher.go
index a6e83039f..da320bdd0 100644
--- a/backend/hasher/hasher.go
+++ b/backend/hasher/hasher.go
@@ -341,6 +341,14 @@ func (f *Fs) MergeDirs(ctx context.Context, dirs []fs.Directory) error {
 	return errors.New("MergeDirs not supported")
 }
 
+// DirSetModTime sets the directory modtime for dir
+func (f *Fs) DirSetModTime(ctx context.Context, dir string, modTime time.Time) error {
+	if do := f.Fs.Features().DirSetModTime; do != nil {
+		return do(ctx, dir, modTime)
+	}
+	return fs.ErrorNotImplemented
+}
+
 // DirCacheFlush resets the directory cache - used in testing
 // as an optional interface
 func (f *Fs) DirCacheFlush() {
@@ -530,6 +538,7 @@ var (
 	_ fs.Abouter         = (*Fs)(nil)
 	_ fs.Wrapper         = (*Fs)(nil)
 	_ fs.MergeDirser     = (*Fs)(nil)
+	_ fs.DirSetModTimer  = (*Fs)(nil)
 	_ fs.DirCacheFlusher = (*Fs)(nil)
 	_ fs.ChangeNotifier  = (*Fs)(nil)
 	_ fs.PublicLinker    = (*Fs)(nil)
diff --git a/backend/union/union.go b/backend/union/union.go
index 5854afc11..a3cb1ce80 100644
--- a/backend/union/union.go
+++ b/backend/union/union.go
@@ -386,6 +386,26 @@ func (f *Fs) DirMove(ctx context.Context, src fs.Fs, srcRemote, dstRemote string
 	return fs.ErrorDirExists
 }
 
+// DirSetModTime sets the directory modtime for dir
+func (f *Fs) DirSetModTime(ctx context.Context, dir string, modTime time.Time) error {
+	upstreams, err := f.action(ctx, dir)
+	if err != nil {
+		return err
+	}
+	errs := Errors(make([]error, len(upstreams)))
+	multithread(len(upstreams), func(i int) {
+		u := upstreams[i]
+		// ignore DirSetModTime on upstreams which don't support it
+		if do := u.Features().DirSetModTime; do != nil {
+			err := do(ctx, dir, modTime)
+			if err != nil {
+				errs[i] = fmt.Errorf("%s: %w", upstreams[i].Name(), err)
+			}
+		}
+	})
+	return errs.Err()
+}
+
 // ChangeNotify calls the passed function with a path
 // that has had changes. If the implementation
 // uses polling, it should adhere to the given interval.
@@ -988,6 +1008,7 @@ var (
 	_ fs.Copier          = (*Fs)(nil)
 	_ fs.Mover           = (*Fs)(nil)
 	_ fs.DirMover        = (*Fs)(nil)
+	_ fs.DirSetModTimer  = (*Fs)(nil)
 	_ fs.DirCacheFlusher = (*Fs)(nil)
 	_ fs.ChangeNotifier  = (*Fs)(nil)
 	_ fs.Abouter         = (*Fs)(nil)