▁of ▁the ▁th res hing ▁fires ▁that ▁had ▁been ▁used ▁to ▁quick en ▁the ▁process ▁of ▁separ ating ▁the ▁whe at . ▁Trad ition ▁also ▁dict ates ▁that ▁the ▁wal n uts ▁have ▁to ▁be ▁and ▁har v ested ▁by ▁hand , ▁one ▁at ▁a ▁time , ▁so ▁as ▁not ▁to ▁damage ▁the ▁shell , ▁during ▁the ▁" night ▁of ▁San ▁Giovanni " ▁or ▁St ▁John ▁the ▁Bapt ist ▁Day ▁( 2 4 ▁June ). ▁The ▁date ▁is ▁appropriate , ▁since ▁this ▁is ▁the ▁time ▁when ▁wal n uts ▁are ▁still ▁flexible , ▁if ▁one ▁is ▁too ▁late , ▁one ▁may ▁find ▁that ▁the ▁wal n uts ▁have ▁hard ened , ▁thus ▁making ▁them ▁in app ropri ate ▁for ▁making ▁N oc ino . ▁N oc ino ▁must n ' t ▁be ▁tried ▁before ▁ 3 ▁November , ▁although ▁if ▁the ▁liqu or ▁is ▁left ▁to ▁m ellow ▁for ▁more ▁than ▁one ▁year ▁the ▁flav our ▁will ▁be ▁rich er . ▁ ▁However , ▁global ▁war ming ▁has ▁started ▁to ▁affect ▁the ▁rip ening ▁process , ▁and ▁in ▁certain ▁areas ▁wal n uts ▁are ▁already ▁too ▁ri pe ▁for ▁N oc ino ▁on ▁ 2 4 ▁June . ▁The ▁ideal ▁time ▁to ▁har vest ▁the ▁wal n uts ▁is ▁when ▁the ▁wal n uts ▁haven ' t ▁hard ened ▁yet . ▁Depending ▁upon ▁the ▁local ▁temperature , ▁the ▁wal n uts ▁may ▁have ▁to ▁be ▁har v ested ▁earlier , ▁such ▁as ▁on ▁ 1 4 ▁or ▁ 1 5 ▁June ▁instead ▁of