This is the 456th most frequent Latvian word.
līgas
The Latvian word "līgas" refers to "celebrations" or "festivities," often associated with the traditional midsummer festival "Jāņu līgošana."
Here, 'līgas' is a plural form in genitive (possessive) case referring to 'league' (sport-related organization).
Līgas vakarā mēs devāmies skatīties futbola līgu spēli.
On the eve of Līga, we went to watch the football league match.
In this context, 'Līgu' is a proper noun, the name 'Liga', in accusative case for direct object of the sentence.
Mēs apciemojām Līgu un pavadījām kopā jauku vakaru.
We visited Liga and spent a lovely evening together.
Here, 'Līgai' is the dative case of the proper noun 'Liga', showing the entity to whom the liking action is directed.