時期, じき
Adverb
time, season, period, phase, stage
1年のこの時期は天候がよく変わる。
には
Expression, Particle, See に・1, emphasises word marked by に
1. to, for, on, in, at
2. in order to
See は・1, indicates respect for subject of sentence
3. as for, regarding
as AにはAが...; emphasizes the repeated word, followed by a contrasting statement
4. while it is (was) the case that ..., indeed ... (but), certainly ... (but)
数学は私には難しい。