If you feel more comfortable doing so, you can. At the end of the day you are eating the same total calories, just modifying the macros. At the end of the 7 day period as long as you are meeting your caloric surplus or deficit is what matters most. Some like to keep them the same everyday, some like to carb cycle, some like to swing calories. Personal preference and what you enjoy doing most.
I came in to say this exact thing. If one needs 21,000 cals per week to gain weight, it does not matter if calories are distributed 3,000 over 7 days or are regulated on off days and training days. Both will illicit the same effect.
To answer your question OP, I personal carb/calorie cycle. Three days per week I eat 2,550 cals, two days per week 2800 and two days 3,050 cals. Carb intake is lowest on the lowest cal days, a little higher on the moderate cal days and the highest on the high cal days. Fat and protein is roughly the same, but I do have set carb macros on each day.
Give the article below a read. It is good on calorie/carb cycling and I built my own diet off that. I do not follow it to a T. Check out my log, the link is in my signature. I post daily macros so you can get a sense of caloric intake plus macros for me.
https://www.t-nation.com/diet-fat-loss/carb-cycling-codex
