Gemara:

Megillah 

Halacha:

Beit HaKenesset,  Tefillah,  Yom Ha'atzmaut 

Holidays:

Yom Yerushalayim 

References: Megilla: 18A  

Description

As we are not composing a new blessing, nor a new praise to G-d, but rather a thanksgiving prayer WITHIN another blessing [i.e.- מודים] + even if there's is a petition to see more miracles, it's a national and not personal one, there seems to be no reason not to compose a על הניסים for these miraculous days. Only problem left is who will write it and if it will be accepted.