diff --git a/action.yml b/action.yml
index f4d010c..6aa0f7b 100644
--- a/action.yml
+++ b/action.yml
@@ -14,6 +14,10 @@ inputs:
     description: 'directory to save the digest setting file, defaults to .github/digests'
     required: false
     default: ".github/digests"
+  timezone:
+    description: 'Timezone to use for the digest, defaults to UTC'
+    required: false
+    default: "UTC"
 
 branding:
   icon: 'align-justify'
@@ -40,6 +44,7 @@ runs:
         GIT_SECRET: ${{ inputs.secret }}
         GIT_REPO: ${{ inputs.repo || env.GITHUB_REPOSITORY }}
         DIGEST_SAVE_DIR: ${{ inputs.save }}
+        TIMEZONE: ${{ inputs.timezone }}
       run: |
         python ${{ github.action_path }}/app.py
       shell: bash
diff --git a/digest_manager.py b/digest_manager.py
index 5b3c94f..6b1ef23 100644
--- a/digest_manager.py
+++ b/digest_manager.py
@@ -36,7 +36,7 @@ def __init__(self, target_repo:str, local_repo:str, target_issue:str, ignore_num
         self.target_issue = target_issue
         self.complete = False
         self.ignore_numbers = ignore_numbers
-        self.last_update_time = datetime.now() - timedelta(days=1)
+        self.last_update_time = helper.get_now() - timedelta(days=1)
         self.create_issue()
         self.update_last_change_date()
 
@@ -45,7 +45,7 @@ def run_query(self, additional_queries: list[str] = []) -> dict:
             additional_queries.append(
                 self.query.partial_query(
                     self.target_repo,
-                    self.last_update_time.strftime("%Y-%m-%dT%H:%M:%SZ"),
+                    helper.format_to_utc(self.last_update_time),
                     self.cursor)
             )
         res = run_queries(additional_queries)
@@ -66,7 +66,7 @@ def get_result(self) -> list[GitIssue]:
                         ret[key].read_paginated_comments(ret[key].comments_query.read_result(res))
         
         return [ret[key] for key in ret]
-    
+
     def update_cursor(self, graphqlResult: dict):
         self.cursor = graphqlResult["endCursor"]
         self.complete = not graphqlResult["hasNextPage"]
@@ -74,14 +74,14 @@ def update_cursor(self, graphqlResult: dict):
     def convert_data(self, graphqlResult: dict, ret: dict[str, GitIssue]):
         for raw_issue in graphqlResult:
             if (raw_issue and raw_issue["number"] not in self.ignore_numbers):
-                issue = GitIssue(raw_issue, (self.last_update_time, datetime.now()))
+                issue = GitIssue(raw_issue, (self.last_update_time, helper.get_now()))
                 ret[issue.id] = issue
     
     def send_data(self, issues: list[GitIssue]):
         r1 = UpdateIssue("update_issue").partial_query(self.target_issue, digest_content)
         r2 = AddComment("new_digest").partial_query(self.target_issue, digest_header.format(
-                    time_start=self.last_update_time.strftime("%Y-%m-%d %H:%M:%S"),
-                    time_end=datetime.now().strftime("%Y-%m-%dT%H:%M:%SZ"),
+                    time_start=helper.format_local(self.last_update_time),
+                    time_end=helper.format_local(helper.get_now()),
                     all_changes=sum([issue.total_changes for issue in issues]),
                     issues_changed=len(issues),
                     body='\n'.join([issue.to_markdown() for issue in issues])
diff --git a/git_structures.py b/git_structures.py
index 8847904..c076b17 100644
--- a/git_structures.py
+++ b/git_structures.py
@@ -59,7 +59,7 @@ def to_markdown(self):
         return comment_template.format(
                 author=self.last_change_author,
                 link=self.source_link,
-                date=helper.format_date(self.last_change_date),
+                date=helper.format_local(self.last_change_date),
                 body=helper.trim_and_format(self.body),
                 status=self.get_status_str(self.time_range)
             )
@@ -111,7 +111,7 @@ def to_markdown(self) -> str:
             temp = issue_template
             header += temp.format(
                 author=self.last_change_author,
-                date=helper.format_date(self.last_change_date),
+                date=helper.format_local(self.last_change_date),
                 status=self.get_status_str(self.time_range),
                 body=helper.trim_and_format(self.body)
             )
diff --git a/gql_queries.py b/gql_queries.py
index 769b6ab..f96a126 100644
--- a/gql_queries.py
+++ b/gql_queries.py
@@ -1,5 +1,6 @@
 from os import environ
 from datetime import datetime
+import sys
 import helper
 import requests
 from string import Template
@@ -8,18 +9,36 @@
 try:
     API_KEY = environ["GIT_SECRET"]
 except KeyError:
-    API_KEY = "Token not available!"
+    print("Token not available!", file=sys.stderr)
+    exit(1)
 
 url = "https://api.github.com/graphql"
 headers = {
     "Authorization": f"token {API_KEY}",
 }
 
+def handle_errors(response: requests.Response) -> None:
+    """
+    If query fails, print the error message and exit the program
+    """
+    if response.status_code != 200:
+        print("Query failed to run by returning code of {}. {}".format(response.status_code, response.text), file=sys.stderr)
+        exit(1)
+
+    data = response.json()
+
+    if 'errors' in data:
+        errors = data["errors"]
+        for error in errors:
+            print("Error: {}".format(error["message"]), file=sys.stderr)
+        exit(1)
+
 def run_queries(queries: list[str]) -> dict:
     payload = {
         "query": f"{{{','.join([q for q in queries])}}}"
     }
     response = requests.post(url, json=payload, headers=headers)
+    handle_errors(response)
     return response.json()["data"]
 
 def run_mutations(queries: list[str]) -> dict:
@@ -28,6 +47,7 @@ def run_mutations(queries: list[str]) -> dict:
     }
 
     response = requests.post(url, json=payload, headers=headers)
+    handle_errors(response)
     return response.json()["data"]
 
 class GithubQuery:
@@ -46,6 +66,7 @@ def run(self, **kwargs) -> dict:
         }
 
         response = requests.post(url, json=payload, headers=headers)
+        handle_errors(response)
         return response.json()["data"]
 
     def partial_query(self, **kwargs) -> str:
diff --git a/helper.py b/helper.py
index 7f0d427..ebba689 100644
--- a/helper.py
+++ b/helper.py
@@ -1,8 +1,21 @@
 from datetime import datetime, timedelta
+import pytz
+from os import environ
 
-convertToDateTime = lambda x: datetime.strptime(x, "%Y-%m-%dT%H:%M:%SZ")
+utc = pytz.utc
+localtz = pytz.timezone(environ["TIMEZONE"])
 
-format_date = lambda x: x.strftime("%Y-%m-%d %H:%M:%S")
+get_now = lambda :datetime.now(utc)
+
+def convertToDateTime(x: str) -> datetime:
+    dt = datetime.strptime(x, "%Y-%m-%dT%H:%M:%SZ")
+    return dt.replace(tzinfo=utc)
+
+def format_local(dt: datetime) -> str:
+    return dt.astimezone(localtz).strftime("%Y-%m-%d %H:%M:%S")
+
+def format_to_utc(dt: datetime) -> str:
+    return dt.astimezone(utc).strftime("%Y-%m-%dT%H:%M:%SZ")
 
 def trim_and_format(x: str) -> str:
     if len(x) > 200:
@@ -10,4 +23,4 @@ def trim_and_format(x: str) -> str:
     return ">" + x.strip().replace("\n", "\n> ")
 
 def get_n_day_prior(n: int) -> datetime:
-    return datetime.now() - timedelta(days=n)
\ No newline at end of file
+    return datetime.now(utc) - timedelta(days=n)
diff --git a/requirements.txt b/requirements.txt
index e521d0c..d3e670a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ charset-normalizer==3.1.0
 idna==3.4
 requests==2.28.2
 urllib3==1.26.15
+pytz==2023.3
\ No newline at end of file