Karthik Sudh 14 (Kartika Shukla 14) is a Hindu lunar date. In Jainism, there is no canonical or widely observed significance attached specifically to Kartik Shukla 14 in either Digambar or Śvetāmbara traditions. Jain festivals and observances are typically tied to tithis and events related to the Tirthankaras (like Mahavir Jayanti, Paryushan, Diwali as Mahavir’s Nirvana, etc.), and to Jain temple pilgrimages and sadhana, rather than to this particular date.

If you’d like, I can share the important Jain festivals and their meanings in simple terms. You can read more here