diff --git a/src/net/torvald/terrarum/gameworld/WorldTime.kt b/src/net/torvald/terrarum/gameworld/WorldTime.kt
index b4f73a307..303ad86e4 100644
--- a/src/net/torvald/terrarum/gameworld/WorldTime.kt
+++ b/src/net/torvald/terrarum/gameworld/WorldTime.kt
@@ -155,6 +155,17 @@ class WorldTime(initTime: Long = 0L) {
             return -23.44 * cos(TWO_PI * x / YEAR_DAYS)
         }
 
+    /**
+     * Ecological season, defined as Prevernal, Vernal, Aestival, Serotinal, Autumnal and Hibernal.
+     *
+     * @return yearly progress of the six seasons, 0f (inclusve) to 6f (exclusive)
+     */
+    val ecologicalSeason: Float
+        get() {
+            val drawTIME_T = TIME_T - (WorldTime.DAY_LENGTH * 10) // offset by -10 days
+            return (drawTIME_T fmod (WorldTime.DAY_LENGTH * WorldTime.YEAR_DAYS).toLong()).toFloat() / (WorldTime.DAY_LENGTH * WorldTime.YEAR_DAYS / 6)
+        }
+
     @Transient private var realSecAcc: Double = 0.0
     @Transient private val REAL_SEC_TO_GAME_SECS = 1.0 / GAME_MIN_TO_REAL_SEC // how slow is real-life clock (second-wise) relative to the ingame one
 
diff --git a/src/net/torvald/terrarum/worlddrawer/BlocksDrawer.kt b/src/net/torvald/terrarum/worlddrawer/BlocksDrawer.kt
index aac68e7f6..6682a3ea9 100644
--- a/src/net/torvald/terrarum/worlddrawer/BlocksDrawer.kt
+++ b/src/net/torvald/terrarum/worlddrawer/BlocksDrawer.kt
@@ -181,9 +181,6 @@ internal object BlocksDrawer {
         return TILES_BLEND_MUL.add(blockID)
     }
 
-    private var drawTIME_T = 0L
-    private val SECONDS_IN_MONTH = WorldTime.MONTH_LENGTH * WorldTime.DAY_LENGTH.toLong()
-
     ///////////////////////////////////////////
     // NO draw lightmap using colour filter, actors must also be hidden behind the darkness
     ///////////////////////////////////////////
@@ -196,8 +193,7 @@ internal object BlocksDrawer {
     internal fun renderData() {
 
         try {
-            drawTIME_T = world.worldTime.TIME_T - (WorldTime.DAY_LENGTH * 10) // offset by -10 days
-            val seasonalMonth = (drawTIME_T fmod (WorldTime.DAY_LENGTH * WorldTime.YEAR_DAYS).toLong()).toFloat() / (WorldTime.DAY_LENGTH * WorldTime.YEAR_DAYS / weatherTerrains.size)
+            val seasonalMonth = world.worldTime.ecologicalSeason
 
             tilesTerrain = weatherTerrains[seasonalMonth.floorToInt()]
             tilesTerrainNext = weatherTerrains[(seasonalMonth + 1).floorToInt() fmod weatherTerrains.size]