The Glovers boss is aware the tight Christmas schedule is a potential make-or-break time for his team, who currently sit 13th in the table.
The Somerset club have shaken off a run of six straight defeats from earlier in the season, and Johnson is hoping they can now move up the table with a successful sequence of results.
He told the Western Gazette: "Every team, in any position in the league, will see that coming out of Christmas and the new year will show them whether they are competing for a play-off space, if they are fighting against relegation, or if they are still in any of the trophies.
"We could come out of Christmas and new year in a very strong position or you could be in a weaker position.
"We want to come out of it strong, but we have some difficult games and trips to Bournemouth and Portsmouth are not going to be easy over a two or three-day period for a small squad.
"But we know the importance of coming out of that period in contention."
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