Sentence examples for yesterday is from inspiring English sources

"yesterday is" is grammatically correct and can be used in written English
It is typically used to indicate that something occurred or was true in the past, with the time frame of "yesterday" being specified. For example: - "Yesterday is a day I will never forget." (indicating that the speaker will always remember something that happened or was experienced yesterday) - "Yesterday is when we decided to start our journey." (indicating the specific day that the decision was made) - "Yesterday is a reminder of how far we've come." (using "yesterday" as a metaphor for the past and indicating growth or progress) It is important to note that "yesterday is" is often used in a more poetic or informal style of writing. In more formal or academic writing, it may be more appropriate to use phrases such as "yesterday was" or "the previous day was".