diff --git a/src/onc/modules/_MultiPage.py b/src/onc/modules/_MultiPage.py
index 856bd48..1443234 100644
--- a/src/onc/modules/_MultiPage.py
+++ b/src/onc/modules/_MultiPage.py
@@ -135,8 +135,12 @@ def _estimatePages(self, response: object, service: str):
             return 0
 
         # total timespan to cover in the next parameter excluding the first page
-        totalBegin = dateutil.parser.parse(response["next"]["parameters"]["dateFrom"])
-        totalEnd = dateutil.parser.parse(response["next"]["parameters"]["dateTo"])
+        totalBegin = dateutil.parser.parse(
+            response["next"]["parameters"]["dateFrom"], ignoretz=True
+        )
+        totalEnd = dateutil.parser.parse(
+            response["next"]["parameters"]["dateTo"], ignoretz=True
+        )
         totalTimespan = totalEnd - totalBegin
 
         # handle cases of very small timeframes
diff --git a/src/onc/onc.py b/src/onc/onc.py
index c0569df..922f983 100644
--- a/src/onc/onc.py
+++ b/src/onc/onc.py
@@ -53,7 +53,7 @@ def __init__(
         token,
         production: bool = True,
         showInfo: bool = False,
-        showWarning: bool = True,
+        showWarning: bool = False,
         outPath: str | Path = "output",
         timeout: int = 60,
     ):
diff --git a/tests/raw_data/test_rawdata_device.py b/tests/raw_data/test_rawdata_device.py
index 2ab3622..2e13959 100644
--- a/tests/raw_data/test_rawdata_device.py
+++ b/tests/raw_data/test_rawdata_device.py
@@ -37,6 +37,14 @@ def test_no_data(requester, params):
     assert _get_row_num(data) == 0
 
 
+def test_different_date_format_all_pages(requester, params_multiple_pages):
+    params_different_date_format = params_multiple_pages | {
+        "dateFrom": "2019-11-23T23:59:00.000Z",
+        "dateTo": "2019-11-24",
+    }
+    requester.getRawdata(params_different_date_format, allPages=True)
+
+
 def test_valid_params_one_page(requester, params, params_multiple_pages):
     data = requester.getRawdata(params)
     data_all_pages = requester.getRawdata(params_multiple_pages, allPages=True)
diff --git a/tests/scalar_data/test_scalardata_device.py b/tests/scalar_data/test_scalardata_device.py
index 274047c..ffbb63e 100644
--- a/tests/scalar_data/test_scalardata_device.py
+++ b/tests/scalar_data/test_scalardata_device.py
@@ -27,6 +27,14 @@ def test_no_data(requester, params_device):
     assert data["sensorData"] is None
 
 
+def test_different_date_format_all_pages(requester, params_multiple_pages):
+    params_different_date_format = params_multiple_pages | {
+        "dateFrom": "2019-11-23T23:59:00.000Z",
+        "dateTo": "2019-11-24",
+    }
+    requester.getScalardata(params_different_date_format, allPages=True)
+
+
 def test_valid_params_one_page(requester, params_device, params_multiple_pages):
     data = requester.getScalardata(params_device)
     data_all_pages = requester.getScalardata(params_multiple_pages, allPages=True)