| 15- December-1988 | Landslide victory for GNLF in Darjeeling Gorkha Hill Council elections. |
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| 20- December-1988 | The Constitution (62nd Amendment) Bill for reducing the voting age from 21 to 18 years receives Parliamentary approval. |
| 31- December-1988 | Treaty signed between India and Pakistan for not to target nuclear sites of each other. |