30 Years Anniversary in Chinese / Japanese...

一日千秋 is a Japanese and Chinese proverb about missing someone.

一日千秋 is often used to express how hard it is to wait for someone's return or to be away from someone.

Some will translate this as “one day feels like a very long time” or “waiting for someone (something) is hard.”

You might see this romanized as a single word, Ichijitsusenshuu, or as “Ichijitsu Senshuu” from Japanese.
If you break down the characters one-by-one, we get:
一 = one/a
日 = day/sun (can also represent time or date)
千 = 1000/thousand
秋 = autumn/fall

Together, 千秋 can mean “autumn comes thousand times” (or 1000 years). It can also be read as 1000 periods of time.
However, it relays the idea of heartache as you wait for someone you miss.

百年好合 is a wish or greeting, often heard at Chinese weddings, for a couple to have 100 good years together.

Some will translate this more naturally into English as: “May you live a long and happy life together.”

The character breakdown:
百 = 100
年 = Years
好 = Good (Happy)
合 = Together

幸福金婚 means “Happy Golden Anniversary” and is a great gift for a couple who is celebrating 50 years together.

The first two characters mean happy, blessed, or happiness.

The last two characters mean “couple's golden anniversary.” It means “golden wedding” or “golden marriage,” but this is only used for the 50-year-mark of a marriage (the same way we use gold to represent 50 years in the west).

幸福金婚 is a nice title to use with an inscription. You could request something like, “Happy 50th Anniversary, Mr. and Mrs. Smith,” to be written down the side of this title in smaller Chinese characters.

Please note: This can be pronounced and understood in Japanese but not as commonly used in Japan. Japanese people who read this will understand it but might tend to feel it’s of Chinese origin.

面壁九年 is a Buddhist term that means “facing a wall for nine years.”

This refers to the Bodhidharma who stared at a wall in meditation at the Shaolin Temple (or in a cave) for nine years until reaching full enlightenment.