| 1- December-1985 | Rajiv Gandhi concludes the first official visit to Japan by an Indian Prime Minister at Tokyo. | 
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| 26- December-1985 | Rajiv Gandhi and Pakistan President Zia-ul-Haq meet in Delhi and agree not to attack nuclear plants in each other's country. | 
| 27- December-1985 | The Indian National Congress party, led by Rajiv Gandhi, begins its centenary celebrations in Bombay. . |