diff --git a/src/config.cpp b/src/config.cpp
index ac321e4..04f2832 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -22,6 +22,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include "logger.h"
 #include "versioninformation.h"
 #include "fsconstants.h"
+#include "ircloggerlist.h"
 
 #include <QFile>
 #include <QListIterator>
@@ -217,6 +218,8 @@ bool Config::initFromJson(const QJsonObject &config, QString* errorString)
                 channel.push_front('#');
             }
             network->channels.push_back(channel);
+
+            IRCLoggerList::get(network->networkName, channel); // Create logger instanse for date indexing at start
         }
         if (network->channels.isEmpty())
         {
diff --git a/src/httpserver.cpp b/src/httpserver.cpp
index 5b23c17..53fdef5 100644
--- a/src/httpserver.cpp
+++ b/src/httpserver.cpp
@@ -32,10 +32,10 @@ HttpServer::HttpServer(QObject *parent) : QTcpServer(parent)
 
     if (not listen(QHostAddress(Config::webUiAddress()), Config::webUiPort()))
     {
-        qFatal("%s", QString("HTTP server not binded at " + Config::webUiAddress() + ":" + QString::number(Config::webUiPort())).toStdString().c_str());
+        qFatal("%s", QString("[WebUI] HTTP server not binded at " + Config::webUiAddress() + ":" + QString::number(Config::webUiPort())).toStdString().c_str());
     }
-    qInfo().noquote() << "HTTP server started at" << Config::webUiAddress() + ":" + QString::number( Config::webUiPort() );
-    qInfo().noquote() << "HTTP server threads:" << m_pool->maxThreadCount();
+    qInfo().noquote() << "[WebUI] HTTP server started at" << Config::webUiAddress() + ":" + QString::number( Config::webUiPort() );
+    qInfo().noquote() << "[WebUI] HTTP server threads:" << m_pool->maxThreadCount();
 }
 
 HttpServer::~HttpServer()
@@ -47,7 +47,7 @@ HttpServer::~HttpServer()
         m_pool->clear();
         if (not m_pool->waitForDone(100))
         {
-            qWarning() << "Thread pool of HTTP server not finished at 100ms";
+            qWarning() << "[WebUI] Thread pool of HTTP server not finished at 100ms";
         }
         m_pool->deleteLater();
     }
diff --git a/src/httpserversocket.cpp b/src/httpserversocket.cpp
index c6ba3ba..6d98e78 100644
--- a/src/httpserversocket.cpp
+++ b/src/httpserversocket.cpp
@@ -27,8 +27,10 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 #include <QDebug>
 
-#define LOG_WARN qWarning().noquote() << "HttpServerSocket:"
-#define LOG_DEBUG qDebug().noquote() << "HttpServerSocket:"
+#define LOG_CRIT qCritical().noquote() << "[WebUI] HttpServerSocket:"
+#define LOG_WARN qWarning().noquote() << "[WebUI] HttpServerSocket:"
+#define LOG_INFO qInfo().noquote() << "[WebUI] HttpServerSocket:"
+#define LOG_DEBUG qDebug().noquote() << "[WebUI] HttpServerSocket:"
 
 constexpr const int VALUE_BEFORE_SPACE_MAX_SIZE = 300;
 constexpr const int HEADERS_MAX_SIZE = 1000;
@@ -55,7 +57,7 @@ void HttpServerSocket::run()
 {
     if (not m_socketDescriptor)
     {
-        qCritical() << "HttpServerSocket::run() called with invalid socket descriptor";
+        LOG_CRIT << "run() called with invalid socket descriptor";
         return;
     }
 
diff --git a/src/irclogger.cpp b/src/irclogger.cpp
index 254eb00..2b0939c 100644
--- a/src/irclogger.cpp
+++ b/src/irclogger.cpp
@@ -24,6 +24,8 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 #include <QDir>
 #include <QDebug>
+#include <QDirIterator>
+#include <QFileInfo>
 
 constexpr const int CACHE_SIZE = 64;
 
@@ -40,6 +42,16 @@ IRCLogger::IRCLogger(const QString &network, const QString &channel) :
             qCritical() << "Can't create chat log directory:" << m_rootDir;
         }
     }
+    else
+    {
+        doDateIndex();
+    }
+}
+
+QList<IRCLogger::Year> IRCLogger::dateIndex() const
+{
+    QMutexLocker lock (&m_dateIndexMtx);
+    return m_dateIndex;
 }
 
 void IRCLogger::addMessage(const QString &sender, const QString &message)
@@ -59,6 +71,7 @@ void IRCLogger::addMessage(const QString &sender, const QString &message)
             qCritical() << "IRCLogger::addMessage can't create directory:" << dir;
             return;
         }
+        doDateIndex();
     }
 
     QFile file (datePath(currentDate));
@@ -135,6 +148,78 @@ QList<QSharedPointer<IRCLogger::Message>> IRCLogger::getMessages(const QDateTime
     return result;
 }
 
+void IRCLogger::doDateIndex()
+{
+    QMutexLocker lock (&m_dateIndexMtx);
+
+    qDebug().noquote() << "["+m_network+"] ["+m_channel+"]" << "Indexing log dates in" << m_rootDir;
+
+    m_dateIndex.clear();
+
+    quint64 yearsCounter = 0;
+    quint64 monthCounter = 0;
+    quint64 daysCounter = 0;
+
+    QDirIterator yearIterator(m_rootDir);
+    while (yearIterator.hasNext())
+    {
+        auto year = QFileInfo(yearIterator.next());
+        if (year.fileName() == "." or year.fileName() == ".." or not year.isDir()) continue;
+        bool converted = false;
+        int16_t yearNumber = year.fileName().toShort(&converted);
+        if (not converted) continue;
+
+        m_dateIndex.push_front({yearNumber, {}});
+        yearsCounter++;
+    }
+    std::sort(m_dateIndex.begin(), m_dateIndex.end());
+
+    for (auto indexIterator = m_dateIndex.begin(); indexIterator != m_dateIndex.end(); indexIterator++)
+    {
+        QDirIterator monthIterator(m_rootDir + "/" + QString::number(indexIterator->first));
+        while (monthIterator.hasNext())
+        {
+            auto month = QFileInfo(monthIterator.next());
+            if (month.fileName() == "." or month.fileName() == ".." or not month.isDir()) continue;
+            bool converted = false;
+            int8_t monthNumber = month.fileName().toShort(&converted);
+            if (not converted) continue;
+
+            indexIterator->second.push_back({monthNumber, {}});
+            monthCounter++;
+        }
+        std::sort(indexIterator->second.begin(), indexIterator->second.end());
+    }
+
+    for (auto indexIterator = m_dateIndex.begin(); indexIterator != m_dateIndex.end(); indexIterator++)
+    {
+        for (auto monthIterator = indexIterator->second.begin(); monthIterator != indexIterator->second.end(); monthIterator++)
+        {
+            QString monthFolder = QString::number(monthIterator->first);
+            if (monthFolder.size() < 2) monthFolder.push_front('0');
+
+            QDirIterator dayIterator(m_rootDir + "/" + QString::number(indexIterator->first) + "/" + monthFolder);
+            while (dayIterator.hasNext())
+            {
+                auto day = QFileInfo(dayIterator.next());
+                if (not day.fileName().endsWith(".txt") or not day.isFile()) continue;
+                QString fileName = day.fileName();
+                static const QRegularExpression rgxOnlyNumbers("[^0-9]");
+                fileName.remove(rgxOnlyNumbers);
+                bool converted = false;
+                int8_t dayNumber = fileName.toShort(&converted);
+                if (not converted) continue;
+
+                monthIterator->second.push_back(dayNumber);
+                daysCounter++;
+            }
+            std::sort(monthIterator->second.begin(), monthIterator->second.end());
+        }
+    }
+
+    qInfo().noquote() << "["+m_network+"] ["+m_channel+"]" << "Log contains" << yearsCounter << "years," << monthCounter << "months and" << daysCounter << "days";
+}
+
 QString IRCLogger::dateDir(const QDateTime &date)
 {
     return m_rootDir + "/" + date.toString("yyyy/MM");
diff --git a/src/irclogger.h b/src/irclogger.h
index 907fa65..b729f1e 100644
--- a/src/irclogger.h
+++ b/src/irclogger.h
@@ -114,22 +114,32 @@ public:
     };
 
 
+    struct DateIndex
+    {
+
+    };
+
+    using Month = QPair<int8_t, QList<int8_t>>; // Month number, days list
+    using Year = QPair<int16_t, QList<Month>>; // Year number, months list
+
     IRCLogger(const QString& network, const QString& channel);
     QString network() const { return m_network; }
     QString channel() const { return m_channel; }
+    QList<Year> dateIndex() const;
 
     void addMessage(const QString& sender, const QString& message);
     QList<QSharedPointer<Message>> getMessages(const QDateTime& date, const quint64* beginId = nullptr, const quint64* endId = nullptr);
 
 private:
+    void doDateIndex();
     QString dateDir(const QDateTime& date);
     QString datePath(const QDateTime& date);
 
+    mutable QMutex m_dateIndexMtx;
+    QList<Year> m_dateIndex;
     Cache m_cache;
     QMutex m_fileIOmtx;
     const QString m_network;
     const QString m_channel;
     const QString m_rootDir;
-
-
 };
diff --git a/src/ircloggerlist.cpp b/src/ircloggerlist.cpp
index 89790fe..a36455b 100644
--- a/src/ircloggerlist.cpp
+++ b/src/ircloggerlist.cpp
@@ -34,6 +34,6 @@ QSharedPointer<IRCLogger> IRCLoggerList::get(const QString &network, const QStri
 
     QSharedPointer<IRCLogger> newLogger (new IRCLogger(network, channel));
     m_data.insert(ident, newLogger);
-    qDebug().noquote() << "["+network+"]" << "Logger for" << channel << "initialized. Global total loggers count:" << m_data.size();
+    qDebug().noquote() << "["+network+"] ["+channel+"] Logger initialized. Global loggers count:" << m_data.size();
     return newLogger;
 }