RMT members will be handing out chocolates to commuters to at least "sweeten the bitter pill of the fare rises".
Rail union the RMT is planning a range of demonstrations at commuter stations for the first official day back at work, in protest against the latest fare increase.
Travelers on Tuesday faced average fare hikes of 3.4 percent, prompting howls from activist groups and London's mayor amid complaints of unreliable rail service.
The candies would "at least sweeten the bitter pill of the fare rises" for passengers, an RMT spokesman added.
RMT general secretary Mick Cash said: "It's another New Year and yet another hike in fares for passengers".
The union is staging 24-hour walk outs on January 8, 10 and 12 on services run by South Western Railway (SWR), Greater Anglia, Merseyrail, Northern, and the Isle of Wight's SWR-operated Island Line.
Rail passengers will feel the effects of the largest fare hike in five years from today, United Kingdom rail fares will rise on average by 3.4% with season tickets up by 3.6%. This rises to 17 per cent in Scotland and compares with between 2.5 per cent and 5 per cent of workers' salaries in countries such as France, Germany, Italy and Spain.