diff --git a/dbms/src/Core/DateTime64.cpp b/dbms/src/Core/DateTime64.cpp
deleted file mode 100644
index 5676f005cea..00000000000
--- a/dbms/src/Core/DateTime64.cpp
+++ /dev/null
@@ -1,22 +0,0 @@
-#include <Core/DateTime64.h>
-
-#include <cassert>
-
-namespace DB {
-
-//static constexpr UInt32 NANOS_PER_SECOND = 1000 * 1000 * 1000;
-
-//DateTime64::Components DateTime64::split() const
-//{
-//    auto datetime = static_cast<time_t>(t / NANOS_PER_SECOND);
-//    auto nanos = static_cast<UInt32>(t % NANOS_PER_SECOND);
-//    return Components { datetime, nanos };
-//}
-
-//DateTime64::DateTime64(DateTime64::Components c)
-//    : t {c.datetime * NANOS_PER_SECOND + c.nanos}
-//{
-//    assert(c.nanos < NANOS_PER_SECOND);
-//}
-
-}
diff --git a/dbms/src/Core/DateTime64.h b/dbms/src/Core/DateTime64.h
deleted file mode 100644
index e87ad217b77..00000000000
--- a/dbms/src/Core/DateTime64.h
+++ /dev/null
@@ -1,28 +0,0 @@
-#pragma once
-
-#include <Core/Types.h>
-
-namespace DB {
-
-//// this is a separate struct to avoid accidental conversions that
-//// might occur between time_t and the type storing the datetime64
-//// time_t might have a different definition on different libcs
-//struct DateTime64 {
-//    using Type = Int64;
-//    struct Components {
-//        time_t datetime = 0;
-//        UInt32 nanos = 0;
-//    };
-
-//    Components split() const;
-//    explicit DateTime64(Components c);
-//    explicit DateTime64(Type tt) : t{tt} {}
-//    explicit operator bool() const {
-//        return t != 0;
-//    }
-//    Type get() const { return t; }
-//private:
-//    Type t;
-//};
-
-}
diff --git a/dbms/src/DataTypes/DataTypeDateTime.h b/dbms/src/DataTypes/DataTypeDateTime.h
index 8dc2ee6ca99..a978bf6962d 100644
--- a/dbms/src/DataTypes/DataTypeDateTime.h
+++ b/dbms/src/DataTypes/DataTypeDateTime.h
@@ -48,7 +48,8 @@ protected:
   * Server time zone is the time zone specified in 'timezone' parameter in configuration file,
   *  or system time zone at the moment of server startup.
   */
-class DataTypeDateTime final : public DataTypeNumberBase<UInt32>, public TimezoneMixin {
+class DataTypeDateTime final : public DataTypeNumberBase<UInt32>, public TimezoneMixin
+{
 public:
     explicit DataTypeDateTime(const std::string & time_zone_name = "");
 
@@ -79,7 +80,8 @@ public:
  *
  * `scale` determines number of decimal places for sub-second part of the DateTime64.
   */
-class DataTypeDateTime64 final : public DataTypeDecimalBase<DateTime64>, public TimezoneMixin {
+class DataTypeDateTime64 final : public DataTypeDecimalBase<DateTime64>, public TimezoneMixin
+{
 public:
     static constexpr UInt8 default_scale = 3;
 
diff --git a/dbms/src/Functions/FunctionDateOrDateTimeToSomething.h b/dbms/src/Functions/FunctionDateOrDateTimeToSomething.h
index ba26e99473d..08c54a8396d 100644
--- a/dbms/src/Functions/FunctionDateOrDateTimeToSomething.h
+++ b/dbms/src/Functions/FunctionDateOrDateTimeToSomething.h
@@ -16,7 +16,8 @@ namespace ErrorCodes
 }
 
 template<class Transform>
-struct WithDateTime64Converter : public Transform {
+struct WithDateTime64Converter : public Transform
+{
     UInt8 scale;
     Transform transform;
 
diff --git a/dbms/src/Functions/now.cpp b/dbms/src/Functions/now.cpp
index e88878b7e93..cdc17e9c570 100644
--- a/dbms/src/Functions/now.cpp
+++ b/dbms/src/Functions/now.cpp
@@ -16,7 +16,8 @@ namespace ErrorCodes
     extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
 }
 
-DateTime64::NativeType nowSubsecond(UInt32 scale) {
+DateTime64::NativeType nowSubsecond(UInt32 scale)
+{
     timespec spec;
     clock_gettime(CLOCK_REALTIME, &spec);