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日本語 Japanese
Family	Sub-family	Language of	Script
Japonic	Japanese	Japan , Palau	Kanji Hiragana Katakana

Since Japanese has a myriad of different expressions for time, both Native to Japanese and Sino-Japanese, I thought it deserved its own section so that you can look over the information all in one place.

Time relative to now

First of all, Japanese has a number of expressions that are used to indicate things like this month, tomorrow, the day before yesterday, etc. They go both by length of time and number of units away from the present. This means that you can have up to two in either direction such as the day after tomorrow.

Time relative to now
Units	-2	-1	0	1	2
Days 漢字	一昨日	昨日	今日	明日	明後日
Days NJ	おとといototoi	きのうkinou	きょうkyou	あした/あすashita/asu	あさってasatte
Days SJ	いっさくじつissakujitsu	さくじつsakujitsu	こんじつ/こんにちkonjitsu/konnichi	みょうにちmyounichi	みょうごにちmyougonichi
Months 漢字	先々月	先月	今月	来月	再来月
Months SJ	せんせんげつsensengetsu	せんげつsengetsu	こんげつkongetsu	らいげつraigetsu	さらいげつsaraigetsu
Years 漢字	一昨年	去年/昨年	今年	来年	再来年
Years NJ	おととしototoshi		ことしkotoshi
Years SJ	いっさくねんissakunen	きょねん/さくねんkyonen/sakunen	こんねんkonnen	らいねんrainen	さらいねんsarainen

• Note that weeks 週shuu work the same as the months.
• Apparently there's also a 一昨昨日sakiototoi for 3 days back, but I don't know if this applies to the others as well

Months

Months in Japanese use a special symbol that resembles a small katakana ke (although it's pronounced ka) to distinguish between whether you're saying which month it is, or how many months' worth of time has gone by.

• When you're referring to the month itself, you simply follow the number by gatsu
• When you're referring to the number of months, you follow the number by kagetsu

Examples:

来月は二月だね。raigetsu wa nigatsu da ne? Next month is February isn't it?
ここに二ヶ月泊まっています。koko ni nikagetsu tomatte imasu. I've been staying here for two months.

Japanese pages
Introduction · Adjectives （形容詞） · Auxiliaries （助辞） · Emphatics （語尾） · Euphony （音便） · Kana （仮名） · Kanji （漢字）: Comparisons (漢字の比べ） · Loanwords （伝来語） · Numbers （数詞） · Te Form （テ形） · Time (時間） · Particles （助詞） · Verbs （動詞）: Example （動詞の例） · Lexicon