How this rashifal is made
Most weekly and monthly horoscopes are written by hand, often weeks in advance. This one is worked out from the actual sky for the period and city you choose. Each day is rated by the house the Moon occupies counted from your rashi (Chandra gochara), and days with the Moon in the 8th (Chandrashtama) are marked as days to go slowly. Surya, Mangal, Budh and Shukra are read by the house they transit from your sign, using the classical favourable houses for each planet, and Shani, Guru and Rahu give the slower background.
Moon sign, not Sun sign
In Vedic astrology your rashi is the sign the Moon was in when you were born, measured in the sidereal zodiac. It is usually different from the Western Sun sign you read in magazines. If you don't know it, the nakshatra finder or your kundali will tell you in seconds.
Want it for your own chart?
A rashifal treats everyone with the same Moon sign alike. My Day goes further: it adds Tara bala from your birth nakshatra and your running dasha.
What the monthly rashifal adds
A month is long enough for the slower patterns to show. The Sun changes sign once a month, on the day of Sankranti, so most months have two halves with a different Surya reading. Mangal, Budh and Shukra may also change sign, or turn retrograde, and Guru and Shani occasionally do. The page lists every one of these changes with its date and time, and reads each planet from your sign before and after the change.
Retrograde planets
A planet is called vakri, or retrograde, when it seems to move backwards against the stars as the Earth overtakes it. Tradition reads a retrograde planet as turning its attention inward: Budh retrograde is a time to double-check messages, documents and travel plans, and Shukra retrograde to go slow on big purchases and new relationships. It is not a time to panic; it is a time to review.
Chandrashtama dates
The Moon returns to the 8th sign from yours roughly every 27 days, so each month has one Chandrashtama window, and sometimes the edge of a second. The monthly page gives the start and end time of each window for your city, which makes it easy to plan journeys, ceremonies and agreements around them.
Why do the planet-change times differ between almanacs?
Almanacs use slightly different values for the ayanamsa and planetary motion. For the fast planets that makes a difference of a few minutes; for Guru and Shani, which move very slowly, it can be a few hours. The date is almost always the same.