Night and Day) is a 1965 Indian Tamil-language crime thriller film directed by Joseph Thaliath Jr.

The film stars then newcomers Jaishankar and C. Vasantha, while S. A. Ashokan, Nagesh, Gandhimathi and Pandari Bai play supporting roles.

Rajasekar is a wealthy college student who lives with his widowed mother Maragadhavalli and leads an untroubled life; he is in love with Parimala, his classmate.

[7] Despite facing competition from other Pongal releases such as Enga Veettu Pillai and Pazhani,[8][9] the film became a commercial success.

[10] The Indian Express said on 6 February 1965, "Iravum Pagalum, despite a muddled script, is above the level of the run-of-the-mill suspense thrillers and has obvious box office potential".