diff --git a/controller.ini b/controller.ini
index 95e2198..f6a83ae 100644
--- a/controller.ini
+++ b/controller.ini
@@ -3,7 +3,7 @@ name = new emgauwa device
 discovery-port = 4421
 relay-count = 10
 database = controller_db.lmdb
-log-level = info
+log-level = debug
 
 [relay-0]
 driver = piface
diff --git a/handlers/loop.c b/handlers/loop.c
index 8ea01e6..d548521 100644
--- a/handlers/loop.c
+++ b/handlers/loop.c
@@ -15,12 +15,14 @@
 void
 handler_loop(controller_t *controller)
 {
+    time_t timestamp = time(NULL);
+    struct tm *time_struct = localtime(&timestamp);
     LOG_DEBUG("===== IDLE LOOP START =====\n");
     for(uint_fast8_t i = 0; i < controller->relay_count; ++i)
     {
         relay_t *relay = controller->relays[i];
         int is_active = 0;
-        if(relay_is_active(relay, time(NULL)))
+        if(relay_is_active(relay, time_struct))
         {
             LOG_DEBUG("relay %d is active\n", i);
             is_active = 1;
diff --git a/helpers/get_day_of_week.c b/helpers/get_day_of_week.c
deleted file mode 100644
index 0214f63..0000000
--- a/helpers/get_day_of_week.c
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <time.h>
-
-#include <helpers.h>
-
-int
-helper_get_weekday(const time_t timestamp_now)
-{
-    struct tm *now = localtime(&timestamp_now);
-    int wday_sun_sat = now->tm_wday;
-    int wday_mon_sun = (wday_sun_sat + 6) % 7;
-    return wday_mon_sun;
-}
diff --git a/helpers/get_weekday.c b/helpers/get_weekday.c
new file mode 100644
index 0000000..68f029e
--- /dev/null
+++ b/helpers/get_weekday.c
@@ -0,0 +1,11 @@
+#include <time.h>
+
+#include <helpers.h>
+
+int
+helper_get_weekday(const struct tm *time_struct)
+{
+    int wday_sun_sat = time_struct->tm_wday;
+    int wday_mon_sun = (wday_sun_sat + 6) % 7;
+    return wday_mon_sun;
+}
diff --git a/include/helpers.h b/include/helpers.h
index 4d59c84..bb9edc0 100644
--- a/include/helpers.h
+++ b/include/helpers.h
@@ -1,6 +1,7 @@
 #ifndef CONTROLLER_HELPERS_H
 #define CONTROLLER_HELPERS_H
 
+#include <time.h>
 #include <confini.h>
 #include <config.h>
 
@@ -32,6 +33,6 @@ void
 helper_parse_cli(int argc, const char **argv, config_t *config);
 
 int
-helper_get_weekday(const time_t timestamp_now);
+helper_get_weekday(const struct tm *time_struct);
 
 #endif /* CONTROLLER_HELPERS_H */
diff --git a/include/models/period.h b/include/models/period.h
index 38a7249..3c87544 100644
--- a/include/models/period.h
+++ b/include/models/period.h
@@ -14,6 +14,6 @@ period_t*
 period_create(uint16_t start, uint16_t end);
 
 int
-period_includes_time(period_t *period, uint16_t timestamp);
+period_includes_time(period_t *period, struct tm *time_struct);
 
 #endif /* CONTROLLER_PERIOD_H */
diff --git a/include/models/relay.h b/include/models/relay.h
index 34f08ba..34ee22c 100644
--- a/include/models/relay.h
+++ b/include/models/relay.h
@@ -51,7 +51,7 @@ int
 relay_save(relay_t *relay, MDB_env *mdb_env);
 
 int
-relay_is_active(relay_t *relay, time_t timestamp_now);
+relay_is_active(relay_t *relay, struct tm *time_struct);
 
 void
 relay_free(relay_t *relay);
diff --git a/logger.c b/logger.c
index fb26d56..ac636d4 100644
--- a/logger.c
+++ b/logger.c
@@ -46,8 +46,7 @@ logger_log(FILE *stream, log_level_t level, const char *filename, int line, cons
     }
 
     char timestamp_str[32];
-    time_t rawtime;
-    time(&rawtime);
+    time_t rawtime = time(NULL);
     strftime(timestamp_str, 32, "%Y-%m-%d %H:%M:%S", localtime(&rawtime));
 
     fprintf(stream, "%s %s:%d:%s " COLOR_NONE, timestamp_str, filename, line, func);
diff --git a/models/period.c b/models/period.c
index 75a4981..d3a7369 100644
--- a/models/period.c
+++ b/models/period.c
@@ -15,11 +15,14 @@ period_create(uint16_t start, uint16_t end)
 }
 
 int
-period_includes_time(period_t *period, uint16_t timestamp)
+period_includes_time(period_t *period, struct tm *time_struct)
 {
     uint16_t start = period->start;
     uint16_t end = period->end;
 
+    time_t timestamp = time_struct->tm_hour * 60;
+    timestamp += time_struct->tm_min;
+
     // "normal" timespan
     if(start < end)
     {
diff --git a/models/relay.c b/models/relay.c
index 59474ba..4d7c0b0 100644
--- a/models/relay.c
+++ b/models/relay.c
@@ -34,22 +34,17 @@ relay_set_name(relay_t *relay, const char *name)
 }
 
 int
-relay_is_active(relay_t *relay, time_t timestamp_now)
+relay_is_active(relay_t *relay, struct tm *time_struct)
 {
-    schedule_t *schedule = relay->schedules[helper_get_weekday(timestamp_now)];
+    schedule_t *schedule = relay->schedules[helper_get_weekday(time_struct)];
     if(schedule->length == 0)
     {
         return 0;
     }
 
-    // we don't need days. reduce to hours, minutes and seconds
-    timestamp_now %= SECONDS_PER_DAY;
-    // finally remove seconds
-    timestamp_now /= SECONDS_PER_MINUTE;
-
     for(uint16_t i = 0; i < schedule->length; ++i)
     {
-        if(period_includes_time(schedule->periods[i], timestamp_now))
+        if(period_includes_time(schedule->periods[i], time_struct))
         {
             return 1;
         }