• kast days,
• past days,
• oast days,
• lzst days,
• lsst days,
• lwst days,
• lqst days,
• laat days,
• lazt days,
• laxt days,
• ladt days,
• laet days,
• lawt days,
• lasr days,
• lasf days,
• lasg days,
• las6 days,
• las5 days,
• last says,
• last xays

The adjective form of "last days" is "last-day".

The plural form of the word "last days" remains the same.

The plural of the "last days" can be the "last days".

The singular form of the word "last days" is "last day"

The singular of the "last days" can be the "day".