diff --git a/lib/autolab/utility.cpp b/lib/autolab/utility.cpp
index ad6379f..cdb0a96 100644
--- a/lib/autolab/utility.cpp
+++ b/lib/autolab/utility.cpp
@@ -20,6 +20,7 @@ double get_timezone_offset() {
   std::time(&raw_time_utc);
 
   std::tm *utc = std::gmtime(&raw_time_utc);
+  utc->tm_isdst = -1;
   std::time_t raw_time_local = std::mktime(utc);
 
   double diff_in_seconds = std::difftime(raw_time_utc, raw_time_local);
diff --git a/lib/logger/logger.h b/lib/logger/logger.h
index fa4a0f9..142da9a 100644
--- a/lib/logger/logger.h
+++ b/lib/logger/logger.h
@@ -52,7 +52,10 @@ namespace Logger {
     fatal_logger &operator<<(T val) {
       if (!prefix_used) {
         prefix_used = true;
-        std::cerr << "fatal: " << prefix << std::endl;
+        std::cerr << "fatal: ";
+        if (prefix.length() > 0) {
+          std::cerr << prefix << std::endl;
+        }
       }
       std::cerr << val;
       return *this;
diff --git a/src/cmd/cmdimp.cpp b/src/cmd/cmdimp.cpp
index a23abe7..e8b5a57 100644
--- a/src/cmd/cmdimp.cpp
+++ b/src/cmd/cmdimp.cpp
@@ -162,9 +162,6 @@ int show_status(cmdargs &cmd) {
       "directory, the details of the assessment will be shown.");
   cmd.setup_done();
 
-  // set up logger
-  Logger::fatal.set_prefix("Cannot show status");
-
   std::string course_name, asmt_name;
   bool in_asmt_dir = read_asmt_file(course_name, asmt_name);
   if (!in_asmt_dir) {
@@ -214,9 +211,6 @@ int download_asmt(cmdargs &cmd) {
   cmd.new_arg("course_name:assessment_name", true);
   cmd.setup_done();
 
-  // set up logger
-  Logger::fatal.set_prefix("Cannot download assessment");
-
   // parse course and assessment name
   std::string course_name, asmt_name;
   parse_course_and_asmt(cmd.args[2], course_name, asmt_name);
@@ -300,9 +294,6 @@ int submit_asmt(cmdargs &cmd) {
 
   std::string course_name, asmt_name, filename;
 
-  // set up logger
-  Logger::fatal.set_prefix("Cannot submit assessment");
-
   if (cmd.nargs() >= 4) {
     // user provided course and assessment name with filename
     parse_course_and_asmt(cmd.args[2], course_name, asmt_name);
@@ -409,9 +400,6 @@ int show_courses(cmdargs &cmd) {
       "List all current courses of the user.");
   cmd.setup_done();
 
-  // set up logger
-  Logger::fatal.set_prefix("Cannot get courses");
-
   // hidden option --use-cache
   if (cmd.has_option("-u", "--use-cache")) {
     print_course_cache_entry();
@@ -471,9 +459,6 @@ int manage_enrolls(cmdargs &cmd) {
       "enrollment data after new, edit, or delete");
   cmd.setup_done();
 
-  // set up logger
-  Logger::fatal.set_prefix("Cannot get enrollments");
-
   std::vector<Autolab::Enrollment> enrollments;
   if (cmd.nargs() == 4) {
     std::string action(cmd.args[2]);
@@ -573,9 +558,6 @@ int show_assessments(cmdargs &cmd) {
   cmd.new_arg("course_name", true);
   cmd.setup_done();
 
-  // set up logger
-  Logger::fatal.set_prefix("Cannot get assessments");
-
   std::string course_name(cmd.args[2]);
 
   // hidden option --use-cache
@@ -622,9 +604,6 @@ int show_problems(cmdargs &cmd) {
   cmd.new_arg("course_name:assessment_name", false);
   cmd.setup_done();
 
-  // set up logger
-  Logger::fatal.set_prefix("Cannot get problems");
-
   std::string course_name, asmt_name;
   // user-specified names take precedence
   if (cmd.nargs() >= 3) {
@@ -662,9 +641,6 @@ int show_scores(cmdargs &cmd) {
       "Show scores from all submission. Default shows only the latest");
   cmd.setup_done();
 
-  // set up logger
-  Logger::fatal.set_prefix("Cannot get scores");
-
   std::string course_name, asmt_name;
   // user-specified names take precedence
   if (cmd.nargs() >= 3) {
@@ -713,9 +689,6 @@ int show_feedback(cmdargs &cmd) {
       "Get feedback for this particular version");
   cmd.setup_done();
 
-  // set up logger
-  Logger::fatal.set_prefix("Cannot get feedback");
-
   std::string course_name, asmt_name;
   // user-specified names take precedence
   if (cmd.nargs() >= 3) {
diff --git a/src/main.cpp b/src/main.cpp
index 03c9ca1..0c189a0 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -133,8 +133,6 @@ int main(int argc, char *argv[]) {
     if ("setup" == command) {
       return user_setup(cmd);
     } else {
-      Logger::fatal.set_prefix("Cannot start autolab client");
-
       if (!init_autolab_client()) {
         Logger::fatal << "No user set up on this client yet." << Logger::endl
           << Logger::endl