minor fixes

bot/handlers/editors/date.py

@@ -56,6 +56,12 @@ async def time_picker(
 
     if not current_value:
         current_value = time(0, 0)
+    else:
+        remainder = current_value.minute % 5
+        if remainder >= 3:
+            current_value += timedelta(minutes=(5 - remainder))
+        else:
+            current_value -= timedelta(minutes=remainder)
 
     for i in range(12):
         keyboard_builder.row(
@@ -173,7 +179,7 @@ async def date_picker(
     else:
         start_date = current_value
 
-    start_date = current_value.replace(day=1)
+    start_date = start_date.replace(day=1)
 
     previous_month = start_date - timedelta(days=1)
     next_month = start_date.replace(day=28) + timedelta(days=4)