Harvest Moon is a series notorious for its numerous bugs, and while most of the bugs in the SNES entry exist as exploits and can either be utilized or ignored to fit the players preferred play-style, a few bugs in the ranch master rate calculation have long forced completionists to have to choose between achieving an unintuitive “perfect” game or settling for a “100%” game. (A “perfect” game could only be achieved by deliberately limiting the shipped crops and girls’ love to just below 512, as a bug in the programming ignored the higher bits.) 

Version used is Harvest Moon - Intuitive Ranch Master With All Fixes And Credits Restoration v2.5 [Infinite Night]:

• not forcing sleep at midnight; instead: time is frozen at the second before midnight (hot springs will not give stamina or happiness boost while time is frozen)
• reverted in-game hour back to lasting 15 real-world seconds again
• un-equiping fishing rod when time is frozen at the second before midnight