diff --git a/spec/std/gzip/gzip_spec.cr b/spec/std/gzip/gzip_spec.cr
index 750fd91a6c0f..2cdd9ecc2bb1 100644
--- a/spec/std/gzip/gzip_spec.cr
+++ b/spec/std/gzip/gzip_spec.cr
@@ -5,7 +5,7 @@ describe Gzip do
   it "writes and reads to memory" do
     io = IO::Memory.new
 
-    time = Time.new(2016, 1, 2)
+    time = Time.utc(2016, 1, 2)
     os = 4_u8
     extra = Bytes[1, 2, 3]
     name = "foo.txt"
diff --git a/spec/std/http/cookie_spec.cr b/spec/std/http/cookie_spec.cr
index c5a928fd00fc..a3e717de404e 100644
--- a/spec/std/http/cookie_spec.cr
+++ b/spec/std/http/cookie_spec.cr
@@ -97,7 +97,7 @@ module HTTP
 
       it "parses expires rfc1123" do
         cookie = parse_set_cookie("key=value; expires=Sun, 06 Nov 1994 08:49:37 GMT")
-        time = Time.new(1994, 11, 6, 8, 49, 37)
+        time = Time.utc(1994, 11, 6, 8, 49, 37)
 
         cookie.name.should eq("key")
         cookie.value.should eq("value")
@@ -106,7 +106,7 @@ module HTTP
 
       it "parses expires rfc1036" do
         cookie = parse_set_cookie("key=value; expires=Sunday, 06-Nov-94 08:49:37 GMT")
-        time = Time.new(1994, 11, 6, 8, 49, 37)
+        time = Time.utc(1994, 11, 6, 8, 49, 37)
 
         cookie.name.should eq("key")
         cookie.value.should eq("value")
@@ -115,7 +115,7 @@ module HTTP
 
       it "parses expires ansi c" do
         cookie = parse_set_cookie("key=value; expires=Sun Nov  6 08:49:37 1994")
-        time = Time.new(1994, 11, 6, 8, 49, 37)
+        time = Time.utc(1994, 11, 6, 8, 49, 37)
 
         cookie.name.should eq("key")
         cookie.value.should eq("value")
@@ -124,12 +124,12 @@ module HTTP
 
       it "parses expires ansi c, variant with zone" do
         cookie = parse_set_cookie("bla=; expires=Thu, 01 Jan 1970 00:00:00 -0000")
-        cookie.expires.should eq(Time.new(1970, 1, 1, 0, 0, 0))
+        cookie.expires.should eq(Time.utc(1970, 1, 1, 0, 0, 0))
       end
 
       it "parses full" do
         cookie = parse_set_cookie("key=value; path=/test; domain=www.example.com; HttpOnly; Secure; expires=Sun, 06 Nov 1994 08:49:37 GMT")
-        time = Time.new(1994, 11, 6, 8, 49, 37)
+        time = Time.utc(1994, 11, 6, 8, 49, 37)
 
         cookie.name.should eq("key")
         cookie.value.should eq("value")
diff --git a/spec/std/http/http_spec.cr b/spec/std/http/http_spec.cr
index a0ab875255e5..e29d4b7ae55f 100644
--- a/spec/std/http/http_spec.cr
+++ b/spec/std/http/http_spec.cr
@@ -3,24 +3,24 @@ require "http"
 
 describe HTTP do
   it "parses RFC 1123" do
-    time = Time.new(1994, 11, 6, 8, 49, 37)
+    time = Time.utc(1994, 11, 6, 8, 49, 37)
     HTTP.parse_time("Sun, 06 Nov 1994 08:49:37 GMT").should eq(time)
   end
 
   it "parses RFC 1123 without day name" do
-    time = Time.new(1994, 11, 6, 8, 49, 37)
+    time = Time.utc(1994, 11, 6, 8, 49, 37)
     HTTP.parse_time("06 Nov 1994 08:49:37 GMT").should eq(time)
   end
 
   it "parses RFC 1036" do
-    time = Time.new(1994, 11, 6, 8, 49, 37)
+    time = Time.utc(1994, 11, 6, 8, 49, 37)
     HTTP.parse_time("Sunday, 06-Nov-94 08:49:37 GMT").should eq(time)
   end
 
   it "parses ANSI C" do
-    time = Time.new(1994, 11, 6, 8, 49, 37)
+    time = Time.utc(1994, 11, 6, 8, 49, 37)
     HTTP.parse_time("Sun Nov  6 08:49:37 1994").should eq(time)
-    time2 = Time.new(1994, 11, 16, 8, 49, 37)
+    time2 = Time.utc(1994, 11, 16, 8, 49, 37)
     HTTP.parse_time("Sun Nov 16 08:49:37 1994").should eq(time2)
   end