--- a/Dockerfile	Thu Oct 29 23:48:35 2020 -0700
+++ b/Dockerfile	Mon Feb 08 16:40:47 2021 -0800
@@ -1,14 +1,15 @@
 FROM ubuntu:focal
+RUN apt-get update
 
 ENV TZ=America/Los_Angeles
 ENV LANG=en_US.UTF-8
 
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata
 
 
 WORKDIR /opt
 
-RUN apt-get update
 RUN apt-get install -y python3-pip
 RUN apt-get install -y git
 

--- a/gcalendarwatch.py	Thu Oct 29 23:48:35 2020 -0700
+++ b/gcalendarwatch.py	Mon Feb 08 16:40:47 2021 -0800
@@ -270,6 +270,8 @@
         self.collection = collection
 
     def getEvents(self, t1, t2):
+        if t1.tzinfo is None or t2.tzinfo is None:
+            raise TypeError("tz-naive datetimes")
         for doc in self.collection.find({"startTime": {"$gte": t1, "$lt": t2}}).sort([("startTime", 1)]):
             doc['uri'] = doc.pop('_id')
             if 'feedId' in doc:
@@ -341,9 +343,12 @@
         upcoming events as JSON-LD
         """
         arg = self.get_argument
-        t1 = parse(arg('t1')) if arg('t1', default=None) else datetime.datetime.now().replace(hour=0, minute=0, second=0)
-        t2 = parse(arg('t2')) if arg('t2',
-                                     default=None) else datetime.datetime.now() + datetime.timedelta(days=int(arg('days')) if arg('days', default=None) else 2)
+        t1, t2 = dayRange(int(arg('days', default='2')))
+        if arg('t1', default=None):
+            t1 = parse(arg('t1'), tzinfo=tzlocal())
+        if arg('t2', default=None):
+            t2 = parse(arg('t2'), tzinfo=tzlocal())
+        log.info(f'get /events local t1={t1} t2={t2}')
         if 0:
             self.set_header("content-type", "application/ld+json")
             self.write(asJsonLd(self.settings.read.getEvents(t1, t2)))