diff --git a/kstars/ekos/align/align.cpp b/kstars/ekos/align/align.cpp
--- a/kstars/ekos/align/align.cpp
+++ b/kstars/ekos/align/align.cpp
@@ -3493,7 +3493,7 @@
 void Align::appendLogText(const QString &text)
 {
     m_LogText.insert(0, i18nc("log entry; %1 is the date, %2 is the text", "%1 %2",
-                              QDateTime::currentDateTime().toString("yyyy-MM-ddThh:mm:ss"), text));
+                              KStarsData::Instance()->lt().toString("yyyy-MM-ddThh:mm:ss"), text));
 
     qCInfo(KSTARS_EKOS_ALIGN) << text;
 
diff --git a/kstars/ekos/capture/capture.cpp b/kstars/ekos/capture/capture.cpp
--- a/kstars/ekos/capture/capture.cpp
+++ b/kstars/ekos/capture/capture.cpp
@@ -2172,7 +2172,7 @@
 void Capture::appendLogText(const QString &text)
 {
     m_LogText.insert(0, i18nc("log entry; %1 is the date, %2 is the text", "%1 %2",
-                              QDateTime::currentDateTime().toString("yyyy-MM-ddThh:mm:ss"), text));
+                              KStarsData::Instance()->lt().toString("yyyy-MM-ddThh:mm:ss"), text));
 
     qCInfo(KSTARS_EKOS_CAPTURE) << text;
 
diff --git a/kstars/ekos/focus/focus.cpp b/kstars/ekos/focus/focus.cpp
--- a/kstars/ekos/focus/focus.cpp
+++ b/kstars/ekos/focus/focus.cpp
@@ -1475,12 +1475,13 @@
     if (Options::focusLogging() && Options::saveFocusImages())
     {
         QDir dir;
+        QDateTime now = KStarsData::Instance()->lt();
         QString path = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "autofocus/" +
-                       QDateTime::currentDateTime().toString("yyyy-MM-dd");
+                       now.toString("yyyy-MM-dd");
         dir.mkpath(path);
         // IS8601 contains colons but they are illegal under Windows OS, so replacing them with '-'
         // The timestamp is no longer ISO8601 but it should solve interoperality issues between different OS hosts
-        QString name     = "autofocus_frame_" + QDateTime::currentDateTime().toString("HH-mm-ss") + ".fits";
+        QString name     = "autofocus_frame_" + now.toString("HH-mm-ss") + ".fits";
         QString filename = path + QStringLiteral("/") + name;
         focusView->getImageData()->saveFITS(filename);
     }
@@ -2197,7 +2198,7 @@
 void Focus::appendLogText(const QString &text)
 {
     m_LogText.insert(0, i18nc("log entry; %1 is the date, %2 is the text", "%1 %2",
-                              QDateTime::currentDateTime().toString("yyyy-MM-ddThh:mm:ss"), text));
+                              KStarsData::Instance()->lt().toString("yyyy-MM-ddThh:mm:ss"), text));
 
     qCInfo(KSTARS_EKOS_FOCUS) << text;
 
diff --git a/kstars/ekos/guide/guide.cpp b/kstars/ekos/guide/guide.cpp
--- a/kstars/ekos/guide/guide.cpp
+++ b/kstars/ekos/guide/guide.cpp
@@ -1254,7 +1254,7 @@
 void Guide::appendLogText(const QString &text)
 {
     m_LogText.insert(0, i18nc("log entry; %1 is the date, %2 is the text", "%1 %2",
-                              QDateTime::currentDateTime().toString("yyyy-MM-ddThh:mm:ss"), text));
+                              KStarsData::Instance()->lt().toString("yyyy-MM-ddThh:mm:ss"), text));
 
     qCInfo(KSTARS_EKOS_GUIDE) << text;
 
diff --git a/kstars/ekos/manager.cpp b/kstars/ekos/manager.cpp
--- a/kstars/ekos/manager.cpp
+++ b/kstars/ekos/manager.cpp
@@ -1955,7 +1955,7 @@
 void Manager::appendLogText(const QString &text)
 {
     m_LogText.insert(0, i18nc("log entry; %1 is the date, %2 is the text", "%1 %2",
-                              QDateTime::currentDateTime().toString("yyyy-MM-ddThh:mm:ss"), text));
+                              KStarsData::Instance()->lt().toString("yyyy-MM-ddThh:mm:ss"), text));
 
     qCInfo(KSTARS_EKOS) << text;
 
diff --git a/kstars/ekos/mount/mount.cpp b/kstars/ekos/mount/mount.cpp
--- a/kstars/ekos/mount/mount.cpp
+++ b/kstars/ekos/mount/mount.cpp
@@ -753,7 +753,7 @@
 void Mount::appendLogText(const QString &text)
 {
     m_LogText.insert(0, i18nc("log entry; %1 is the date, %2 is the text", "%1 %2",
-                              QDateTime::currentDateTime().toString("yyyy-MM-ddThh:mm:ss"), text));
+                              KStarsData::Instance()->lt().toString("yyyy-MM-ddThh:mm:ss"), text));
 
     qCInfo(KSTARS_EKOS_MOUNT) << text;
 
diff --git a/kstars/ekos/observatory/observatory.cpp b/kstars/ekos/observatory/observatory.cpp
--- a/kstars/ekos/observatory/observatory.cpp
+++ b/kstars/ekos/observatory/observatory.cpp
@@ -7,6 +7,8 @@
     version 2 of the License, or (at your option) any later version.
  */
 
+#include "kstarsdata.h"
+
 #include "observatory.h"
 
 #include "ekos_observatory_debug.h"
@@ -631,7 +633,7 @@
 void Observatory::appendLogText(const QString &text)
 {
     m_LogText.insert(0, i18nc("log entry; %1 is the date, %2 is the text", "%1 %2",
-                              QDateTime::currentDateTime().toString("yyyy-MM-ddThh:mm:ss"), text));
+                              KStarsData::Instance()->lt().toString("yyyy-MM-ddThh:mm:ss"), text));
 
     qCInfo(KSTARS_EKOS_OBSERVATORY) << text;
 
diff --git a/kstars/ekos/scheduler/scheduler.h b/kstars/ekos/scheduler/scheduler.h
--- a/kstars/ekos/scheduler/scheduler.h
+++ b/kstars/ekos/scheduler/scheduler.h
@@ -476,6 +476,8 @@
         void setINDICommunicationStatus(Ekos::CommunicationStatus status);
         void setEkosCommunicationStatus(Ekos::CommunicationStatus status);
 
+        void simClockScaleChanged(float);
+
     signals:
         void newLog(const QString &text);
         void newStatus(Ekos::SchedulerState state);
diff --git a/kstars/ekos/scheduler/scheduler.cpp b/kstars/ekos/scheduler/scheduler.cpp
--- a/kstars/ekos/scheduler/scheduler.cpp
+++ b/kstars/ekos/scheduler/scheduler.cpp
@@ -198,6 +198,9 @@
 
     connect(twilightCheck, &QCheckBox::toggled, this, &Scheduler::checkTwilightWarning);
 
+    // Connect simulation clock scale
+    connect(KStarsData::Instance()->clock(), &SimClock::scaleChanged, this, &Scheduler::simClockScaleChanged);
+
     // restore default values for error handling strategy
     setErrorHandlingStrategy(static_cast<ErrorHandlingStrategy>(Options::errorHandlingStrategy()));
     errorHandlingRescheduleErrorsCB->setChecked(Options::rescheduleErrors());
@@ -373,7 +376,7 @@
         m_LogText.removeLast();
 
     m_LogText.prepend(i18nc("log entry; %1 is the date, %2 is the text", "%1 %2",
-                            QDateTime::currentDateTime().toString("yyyy-MM-ddThh:mm:ss"), text));
+                            KStarsData::Instance()->lt().toString("yyyy-MM-ddThh:mm:ss"), text));
 
     qCInfo(KSTARS_EKOS_SCHEDULER) << text;
 
@@ -1679,7 +1682,7 @@
             appendLogText(i18n("All jobs aborted. Waiting %1 seconds to re-schedule.", errorHandlingDelaySB->value()));
 
             // wait the given delay until the jobs will be evaluated again
-            sleepTimer.setInterval(( errorHandlingDelaySB->value() * 1000));
+            sleepTimer.setInterval(std::lround((errorHandlingDelaySB->value() * 1000) / KStarsData::Instance()->clock()->scale()));
             sleepTimer.start();
             sleepLabel->setToolTip(i18n("Scheduler waits for a retry."));
             sleepLabel->show();
@@ -4567,7 +4570,7 @@
             appendLogText(i18n("Waiting %1 seconds to restart job '%2'.", errorHandlingDelaySB->value(), currentJob->getName()));
 
             // wait the given delay until the jobs will be evaluated again
-            sleepTimer.setInterval(( errorHandlingDelaySB->value() * 1000));
+            sleepTimer.setInterval(std::lround((errorHandlingDelaySB->value() * 1000) / KStarsData::Instance()->clock()->scale()));
             sleepTimer.start();
             sleepLabel->setToolTip(i18n("Scheduler waits for a retry."));
             sleepLabel->show();
@@ -6690,6 +6693,20 @@
     m_EkosCommunicationStatus = status;
 }
 
+void Scheduler::simClockScaleChanged(float newScale)
+{
+    if (sleepTimer.isActive())
+    {
+        QTime const remainingTimeMs = QTime::fromMSecsSinceStartOfDay(std::lround((double) sleepTimer.remainingTime()
+                                                                                  * KStarsData::Instance()->clock()->scale()
+                                                                                  / newScale));
+        appendLogText(i18n("Sleeping for %2 on simulation clock update until observation job %1 is ready...", currentJob->getName(),
+                           remainingTimeMs.toString("hh:mm:ss")));
+        sleepTimer.stop();
+        sleepTimer.start(remainingTimeMs.msecsSinceStartOfDay());
+    }
+}
+
 void Scheduler::registerNewModule(const QString &name)
 {
     qCDebug(KSTARS_EKOS_SCHEDULER) << "Registering new Module (" << name << ")";
@@ -7259,7 +7276,7 @@
         // Wake up when job is due.
         // FIXME: Implement waking up periodically before job is due for weather check.
         // int const nextWakeup = nextObservationTime < 60 ? nextObservationTime : 60;
-        sleepTimer.setInterval( (nextObservationTime + 1) * 1000);
+        sleepTimer.setInterval(std::lround(((nextObservationTime + 1) * 1000) / KStarsData::Instance()->clock()->scale()));
         sleepTimer.start();
 
         return true;
@@ -7309,7 +7326,7 @@
         // Wake up when job is due.
         // FIXME: Implement waking up periodically before job is due for weather check.
         // int const nextWakeup = nextObservationTime < 60 ? nextObservationTime : 60;
-        sleepTimer.setInterval(( (nextObservationTime + 1) * 1000));
+        sleepTimer.setInterval(std::lround(((nextObservationTime + 1) * 1000) / KStarsData::Instance()->clock()->scale()));
         sleepTimer.start();
 
         return true;
diff --git a/kstars/time/simclock.cpp b/kstars/time/simclock.cpp
--- a/kstars/time/simclock.cpp
+++ b/kstars/time/simclock.cpp
@@ -182,13 +182,13 @@
     if (Scale != s)
     {
         qCInfo(KSTARS) << "New clock scale: " << s << " sec";
+        emit scaleChanged(s);
         Scale = s;
         if (tmr.isActive())
         {
             julianmark = UTC.djd();
             sysmark.start();
             lastelapsed = 0;
         }
-        emit scaleChanged(s);
     }
 }