A4------RTC-------lcd+buttons-----4.7K pullup resistor---Vcc (5V typically)
A5-----RTC--------lcd+buttons-----4.7K pullup resistor---Vcc (5V typically)
A4------RTC-------lcd+buttons-----4.7K pullup resistor---Vcc (5V typically)
A5-----RTC--------lcd+buttons-----4.7K pullup resistor---Vcc (5V typically)