diff --git a/src/Functions/formatDateTime.cpp b/src/Functions/formatDateTime.cpp
index 2239bae987f..293710fc190 100644
--- a/src/Functions/formatDateTime.cpp
+++ b/src/Functions/formatDateTime.cpp
@@ -480,7 +480,7 @@ public:
                     // since right now LUT does not support Int64-values and not format instructions for subsecond parts,
                     // treat DatTime64 values just as DateTime values by ignoring fractional and casting to UInt32.
                     const auto c = DecimalUtils::split(vec[i], scale);
-                    instruction.perform(pos, static_cast<UInt32>(c.whole), time_zone);
+                    instruction.perform(pos, static_cast<Int64>(c.whole), time_zone);
                 }
             }
             else
diff --git a/src/IO/ReadHelpers.h b/src/IO/ReadHelpers.h
index 369237f329d..cf25b819e6c 100644
--- a/src/IO/ReadHelpers.h
+++ b/src/IO/ReadHelpers.h
@@ -773,7 +773,8 @@ inline ReturnType readDateTimeTextImpl(DateTime64 & datetime64, UInt32 scale, Re
         while (!buf.eof() && isNumericASCII(*buf.position()))
             ++buf.position();
     }
-    else if (scale && (whole >= 1000000000LL * scale))
+    /// 9908870400 is time_t value for 2184-01-01 UTC (a bit over the last year supported by DateTime64)
+    else if (whole >= 9908870400LL)
     {
         /// Unix timestamp with subsecond precision, already scaled to integer.
         /// For disambiguation we support only time since 2001-09-09 01:46:40 UTC and less than 30 000 years in future.
diff --git a/tests/queries/0_stateless/018002_formatDateTime_DateTime64_century.reference b/tests/queries/0_stateless/018002_formatDateTime_DateTime64_century.reference
new file mode 100644
index 00000000000..75c114cdd74
--- /dev/null
+++ b/tests/queries/0_stateless/018002_formatDateTime_DateTime64_century.reference
@@ -0,0 +1,27 @@
+-- { echo }
+
+SELECT formatDateTime(toDateTime64('1935-12-12 12:12:12', 0, 'Europe/Moscow'), '%C');
+19
+SELECT formatDateTime(toDateTime64('1969-12-12 12:12:12', 0, 'Europe/Moscow'), '%C');
+19
+SELECT formatDateTime(toDateTime64('1989-12-12 12:12:12', 0, 'Europe/Moscow'), '%C');
+19
+SELECT formatDateTime(toDateTime64('2019-09-16 19:20:12', 0, 'Europe/Moscow'), '%C');
+20
+SELECT formatDateTime(toDateTime64('2105-12-12 12:12:12', 0, 'Europe/Moscow'), '%C');
+21
+SELECT formatDateTime(toDateTime64('2205-12-12 12:12:12', 0, 'Europe/Moscow'), '%C');
+22
+-- non-zero scale
+SELECT formatDateTime(toDateTime64('1935-12-12 12:12:12', 6, 'Europe/Moscow'), '%C');
+19
+SELECT formatDateTime(toDateTime64('1969-12-12 12:12:12', 6, 'Europe/Moscow'), '%C');
+19
+SELECT formatDateTime(toDateTime64('1989-12-12 12:12:12', 6, 'Europe/Moscow'), '%C');
+19
+SELECT formatDateTime(toDateTime64('2019-09-16 19:20:12', 0, 'Europe/Moscow'), '%C');
+20
+SELECT formatDateTime(toDateTime64('2105-12-12 12:12:12', 6, 'Europe/Moscow'), '%C');
+21
+SELECT formatDateTime(toDateTime64('2205-01-12 12:12:12', 6, 'Europe/Moscow'), '%C');
+22
diff --git a/tests/queries/0_stateless/018002_formatDateTime_DateTime64_century.sql b/tests/queries/0_stateless/018002_formatDateTime_DateTime64_century.sql
new file mode 100644
index 00000000000..e368f45cbda
--- /dev/null
+++ b/tests/queries/0_stateless/018002_formatDateTime_DateTime64_century.sql
@@ -0,0 +1,16 @@
+-- { echo }
+
+SELECT formatDateTime(toDateTime64('1935-12-12 12:12:12', 0, 'Europe/Moscow'), '%C');
+SELECT formatDateTime(toDateTime64('1969-12-12 12:12:12', 0, 'Europe/Moscow'), '%C');
+SELECT formatDateTime(toDateTime64('1989-12-12 12:12:12', 0, 'Europe/Moscow'), '%C');
+SELECT formatDateTime(toDateTime64('2019-09-16 19:20:12', 0, 'Europe/Moscow'), '%C');
+SELECT formatDateTime(toDateTime64('2105-12-12 12:12:12', 0, 'Europe/Moscow'), '%C');
+SELECT formatDateTime(toDateTime64('2205-12-12 12:12:12', 0, 'Europe/Moscow'), '%C');
+
+-- non-zero scale
+SELECT formatDateTime(toDateTime64('1935-12-12 12:12:12', 6, 'Europe/Moscow'), '%C');
+SELECT formatDateTime(toDateTime64('1969-12-12 12:12:12', 6, 'Europe/Moscow'), '%C');
+SELECT formatDateTime(toDateTime64('1989-12-12 12:12:12', 6, 'Europe/Moscow'), '%C');
+SELECT formatDateTime(toDateTime64('2019-09-16 19:20:12', 0, 'Europe/Moscow'), '%C');
+SELECT formatDateTime(toDateTime64('2105-12-12 12:12:12', 6, 'Europe/Moscow'), '%C');
+SELECT formatDateTime(toDateTime64('2205-01-12 12:12:12', 6, 'Europe/Moscow'), '%C');
\ No newline at end of file
diff --git a/tests/queries/0_stateless/018002_toDateTime64_large_values.reference b/tests/queries/0_stateless/018002_toDateTime64_large_values.reference
new file mode 100644
index 00000000000..c44c61ab93a
--- /dev/null
+++ b/tests/queries/0_stateless/018002_toDateTime64_large_values.reference
@@ -0,0 +1,10 @@
+-- { echo }
+
+SELECT toDateTime64('2205-12-12 12:12:12', 0, 'UTC');
+2205-12-12 12:12:12
+SELECT toDateTime64('2205-12-12 12:12:12', 0, 'Europe/Moscow');
+2205-12-12 12:12:12
+SELECT toDateTime64('2205-12-12 12:12:12', 6, 'Europe/Moscow');
+2205-12-12 12:12:12.000000
+SELECT toDateTime64('2205-12-12 12:12:12', 6, 'Europe/Moscow');
+2205-12-12 12:12:12.000000
diff --git a/tests/queries/0_stateless/018002_toDateTime64_large_values.sql b/tests/queries/0_stateless/018002_toDateTime64_large_values.sql
new file mode 100644
index 00000000000..299111f43bc
--- /dev/null
+++ b/tests/queries/0_stateless/018002_toDateTime64_large_values.sql
@@ -0,0 +1,7 @@
+-- { echo }
+
+SELECT toDateTime64('2205-12-12 12:12:12', 0, 'UTC');
+SELECT toDateTime64('2205-12-12 12:12:12', 0, 'Europe/Moscow');
+
+SELECT toDateTime64('2205-12-12 12:12:12', 6, 'Europe/Moscow');
+SELECT toDateTime64('2205-12-12 12:12:12', 6, 'Europe/Moscow');
\ No newline at end of file