diff --git a/slo_generator/constants.py b/slo_generator/constants.py
index cd47f62a..5c18a366 100644
--- a/slo_generator/constants.py
+++ b/slo_generator/constants.py
@@ -28,6 +28,7 @@
 COLORED_OUTPUT: int = int(os.environ.get("COLORED_OUTPUT", "0"))
 DRY_RUN: bool = bool(int(os.environ.get("DRY_RUN", "0")))
 DEBUG: int = int(os.environ.get("DEBUG", "0"))
+LOGGING_TIMESTAMP_ENABLED: int = int(os.environ.get("LOGGING_TIMESTAMP_ENABLED", "0"))
 
 # Exporters supporting v2 SLO report format
 V2_EXPORTERS: Tuple[str, ...] = ("Pubsub", "Cloudevent")
diff --git a/slo_generator/utils.py b/slo_generator/utils.py
index b88534fc..1cdec92a 100644
--- a/slo_generator/utils.py
+++ b/slo_generator/utils.py
@@ -33,7 +33,7 @@
 import yaml
 from dateutil import tz
 
-from slo_generator.constants import DEBUG
+from slo_generator.constants import DEBUG, LOGGING_TIMESTAMP_ENABLED
 
 try:
     # pytype: disable=import-error
@@ -181,8 +181,12 @@ def setup_logging():
     else:
         level = logging.INFO
         format_str = "%(levelname)s - %(message)s"
+
+    if LOGGING_TIMESTAMP_ENABLED == "1":
+        format_str = "%(asctime)s " + format_str
+
     logging.basicConfig(
-        stream=sys.stdout, level=level, format=format_str, datefmt="%m/%d/%Y %I:%M:%S"
+        stream=sys.stdout, level=level, format=format_str, datefmt="%m/%d/%Y %H:%M:%S"
     )
     logging.getLogger("googleapiclient").setLevel(logging.ERROR)