Date & Time Calculator is a Generative Pre-training Transformer (GPT) that specializes in making precise date and time calculations. Leveraging the base capabilities of ChatGPT, this tool assists users in determining and manipulating dates and times based on their queries. The GPT is utilized to provide answers to a range of date and time-related questions or compute adjustments to specific dates and times according to user input. The tool has possible applications in various areas such as project planning, event organization, or any circumstances where time computations are essential. For instance, questions or commands could range from finding out the date in a specified number of days to calculating the number of hours left in a week. The tool can handle future and past date computations as well as time adjustments, such as adding or subtracting certain time intervals, offering flexibility in terms of usage. Despite its seemingly simple operation, its underlying use of AI technology enables it to handle more complex date and time computations efficiently. Note that the use of this GPT requires ChatGPT Plus.