adding pytz to enforce utc everywhere

Pipfile

@@ -7,6 +7,7 @@ name = "pypi"
 pyramid = "*"
 zappa = "*"
 boto3 = "*"
+pytz = "*"
 
 [dev-packages]
 

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "55e0fb489f47c86e4c53aaf61bbbb75bb2628725636eb1c7ca4dbbc4a09145e6"
+            "sha256": "59f231989196004c8eecb3b0e59316baf14fb7ec42ba638d4d8a7c34cccc49d9"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -32,25 +32,25 @@
         },
         "boto3": {
             "hashes": [
-                "sha256:08f268d6eb3347061384e144121dcca1e454a7a8b6c8424a23d3a312cdebab68",
-                "sha256:ce462e7505c03c3e6708ce6f264ac43d478886082af703ff69c502592df5d4f3"
+                "sha256:2f3592f19847c6da02662e7a688a0d26731a36b06357c87da96257712a533dcf",
+                "sha256:f2be145131cdc0837fb759f04156895f86eb21e26318158c611fcb8e9b6734c5"
             ],
             "index": "pypi",
-            "version": "==1.7.58"
+            "version": "==1.8.8"
         },
         "botocore": {
             "hashes": [
-                "sha256:17a88a578161dc12ecf14950afa93a354cf009380977921f7f52891acc5e751a",
-                "sha256:e0e6b6d1fdbce81c28151136ee919d2cdeee13041559710cd5c93d7e4035a455"
+                "sha256:c05733dd4fed3c79283fb77f4e9c8d5a65571c45e7eec7a6158bfed54446c3ac",
+                "sha256:e3c9ba538e3e60ac414a84e0bcc7ec3fb64716b6004cbf99a68aad39b7d67e08"
             ],
-            "version": "==1.10.58"
+            "version": "==1.11.8"
         },
         "certifi": {
             "hashes": [
-                "sha256:13e698f54293db9f89122b0581843a782ad0934a4fe0172d2a980ba77fc61bb7",
-                "sha256:9fa520c1bacfb634fa7af20a76bcbd3d5fb390481724c597da32c719a7dca4b0"
+                "sha256:376690d6f16d32f9d1fe8932551d80b23e9d393a8578c5633a2ed39a64861638",
+                "sha256:456048c7e371c089d0a77a5212fb37a2c2dce1e24146e3b7e0261736aaeaa22a"
             ],
-            "version": "==2018.4.16"
+            "version": "==2018.8.24"
         },
         "cfn-flip": {
             "hashes": [
@@ -93,10 +93,7 @@
             "version": "==0.16.0"
         },
         "futures": {
-            "hashes": [
-                "sha256:9ec02aa7d674acb8618afb127e27fde7fc68994c0437ad759fa094a574adb265",
-                "sha256:ec0a6cb848cc212002b9828c3e34c675e0c9ff6741dc445cab6fdd4e1085d1f1"
-            ],
+            "hashes": [],
             "version": "==3.2.0"
         },
         "hjson": {
@@ -148,9 +145,9 @@
         },
         "placebo": {
             "hashes": [
-                "sha256:8aa848b892924786fa5e37e75524e8ec039b7d54860d35c51ffb4ed3e30590c5"
+                "sha256:40269b5eeaf1ee9a28491ef982c722d1aebff577a0815528906bf392a10265a5"
             ],
-            "version": "==0.8.1"
+            "version": "==0.8.2"
         },
         "plaster": {
             "hashes": [
@@ -189,21 +186,23 @@
             ],
             "version": "==1.2.4"
         },
+        "pytz": {
+            "hashes": [
+                "sha256:a061aa0a9e06881eb8b3b2b43f05b9439d6583c206d0a6c340ff72a7b6669053",
+                "sha256:ffb9ef1de172603304d9d2819af6f5ece76f2e85ec10692a524dd876e72bf277"
+            ],
+            "index": "pypi",
+            "version": "==2018.5"
+        },
         "pyyaml": {
             "hashes": [
-                "sha256:0c507b7f74b3d2dd4d1322ec8a94794927305ab4cebbe89cc47fe5e81541e6e8",
                 "sha256:16b20e970597e051997d90dc2cddc713a2876c47e3d92d59ee198700c5427736",
                 "sha256:3262c96a1ca437e7e4763e2843746588a965426550f3797a79fca9c6199c431f",
-                "sha256:326420cbb492172dec84b0f65c80942de6cedb5233c413dd824483989c000608",
-                "sha256:4474f8ea030b5127225b8894d626bb66c01cda098d47a2b0d3429b6700af9fd8",
                 "sha256:592766c6303207a20efc445587778322d7f73b161bd994f227adaa341ba212ab",
                 "sha256:5ac82e411044fb129bae5cfbeb3ba626acb2af31a8d17d175004b70862a741a7",
-                "sha256:5f84523c076ad14ff5e6c037fe1c89a7f73a3e04cf0377cb4d017014976433f3",
                 "sha256:827dc04b8fa7d07c44de11fabbc888e627fa8293b695e0f99cb544fdfa1bf0d1",
-                "sha256:b4c423ab23291d3945ac61346feeb9a0dc4184999ede5e7c43e1ffb975130ae6",
                 "sha256:bc6bced57f826ca7cb5125a10b23fd0f2fff3b7c4701d64c439a300ce665fff8",
                 "sha256:c01b880ec30b5a6e6aa67b09a2fe3fb30473008c85cd6a67359a1b15ed6d83a4",
-                "sha256:ca233c64c6e40eaa6c66ef97058cdc80e8d0157a443655baa1b2966e812807ca",
                 "sha256:e863072cdf4c72eebf179342c94e6989c67185842d9997960b3e69290b2fa269"
             ],
             "version": "==3.12"
@@ -258,9 +257,9 @@
         },
         "troposphere": {
             "hashes": [
-                "sha256:aecc32359326634c9911ae4bea05d308822b827787926dcc038c153410ce380b"
+                "sha256:c34b2ecec9ceeaca7c22c53b5440a712c08a260332f23faef436b43946576681"
             ],
-            "version": "==2.3.1"
+            "version": "==2.3.3"
         },
         "unidecode": {
             "hashes": [
@@ -312,11 +311,11 @@
         },
         "zappa": {
             "hashes": [
-                "sha256:cb70195801efb8ae50c78d5180640afe1bcb9317d3c11da97b6d3588b90aea89",
-                "sha256:d841b2ca57c80c2fe5cd9098763ab26f59580658838eb77fcdefeed894543d45"
+                "sha256:6b303a82698035d465e3426008a355b17733204c205e6efab7b4168ac84eb918",
+                "sha256:b4d310821d19c773f9d1457fa00287c154097c72e502d71f0879cb765a2130b4"
             ],
             "index": "pypi",
-            "version": "==0.46.1"
+            "version": "==0.46.2"
         },
         "zope.deprecation": {
             "hashes": [