To find a relative date, specifically 90 days in the past from a given date like 12th of August, manual calculation following a few steps can help simplify the process. Begin by identifying the target date, in this case, 12th of August. Then, subtract 90 days from this date to determine the desired relative date. When subtracting 90 days from the 12th of August, counting backwards in the calendar could be an effective method.

Calculating 90 days in the past from 12th of August involves taking into account the varying number of days in each month and adjusting accordingly. By breaking down the calculation into months with specific days, one can accurately compute the relative date in the past. Utilizing a calendar or date calculator may also aid in this process to ensure precision and accuracy.

Furthermore, mastering the concept of date arithmetic proves valuable when computing past dates manually. Understanding how to navigate historical dates by adding or subtracting days, months, and years allows for better control over temporal calculations. With practice, manual date calculations become more intuitive and efficient, granting individuals the ability to determine relative dates with ease.

In addition to honing manual calculation skills, leveraging technology such as spreadsheet software or online date calculators can streamline the process of finding relative dates. These tools automate the arithmetic operations, offering instant results and eliminating the margin for error often associated with manual computations. Embracing both manual techniques and technological aids ensures accurate and efficient date calculations for various applications.