You can add 12 turns per year script and have around 1200 turns..
Open your M2TW\ mods\ Third_Age_3\ data\ world\ maps\ campaign\ imperial_campaign and first make a backup of these two files:
campaign_script .txt and descr_strat .txt.
Now open campaign_script .txt file, and scroll down to Aging & Season script, ccopy \ paste this code:
Code:
declare_counter month
set_counter month 1 ;set to January
monitor_event PreFactionTurnStart FactionIsLocal ; set the season for each month
if I_CompareCounter month == 1 ;January
console_command season winter
end_if
if I_CompareCounter month == 2 ;February
console_command season winter
end_if
if I_CompareCounter month == 3 ;March
console_command season summer
end_if
if I_CompareCounter month == 4 ;April
console_command season summer
end_if
if I_CompareCounter month == 5 ;May
console_command season summer
end_if
if I_CompareCounter month == 6 ;June
console_command season summer
end_if
if I_CompareCounter month == 7 ;July
console_command season summer
end_if
if I_CompareCounter month == 8 ;August
console_command season summer
end_if
if I_CompareCounter month == 9 ;September
console_command season summer
end_if
if I_CompareCounter month == 10 ;October
console_command season winter
end_if
if I_CompareCounter month == 11 ;November
console_command season winter
end_if
if I_CompareCounter month == 12 ;December
console_command season winter
end_if
inc_counter month 1 ;advance the month
if I_CompareCounter month == 13 ;start a new year
set_counter month 1
end_if
end_monitor
monitor_event FactionTurnEnd FactionType slave
and I_CompareCounter month < 12
console_command season summer
end_monitor
And put it over the same one which is there, so that it looks like this:
And then open descr_strat .txt file, and change the start date to winter, and timescale to 0.0835, so that it look like this:
Save and exit.
Delete map.rwm file found in M2TW\ mods\ Third_Age_3\ data\ world\ maps\ base folder and start a new game.