The combination 7/10 or 7th October, can be seen as a symbolic meeting point between Western and Eastern worlds, or the modern and the ancient

There are 7 days in a week in English
But 10 days in a week in Ahom

There are 7 heavenly realms in Western Beliefs
Whereas 10 heavenly realms in Eastern Beliefs

While there are 7 virtues in Christianity
There are 10 virtues in Buddhism

7th October or 7/10 thus forms an important West/East connection which makes the date very easy to remember while also being linked to Tai-Kadai symbolism