This thesis associates the baptismal timing from the apostolic era through the fifth century CE, with the eschatological theology of baptism through the symbolic meaning of daylight and night darkness. Through textual criticism of primary sources, the study demonstrates that these temporal changes reflect deepening theological understanding of baptism as participation in Christ's death and resurrection rather than mere practical accommodations.

The research reveals that the shift to baptisms that began during nighttime emphasized dying with Christ in darkness, while at the same time the adoption of dawn immersion highlighted resurrection symbolism. Primary sources from diverse geographical regions show both variations and common theological threads, with communities exploring different dimensions of baptism's Paschal mystery through their timing choices.

The findings demonstrate that baptismal timing functions as a sacramental vessel for eternal realities, where liturgical time mediates between chronological and salvific time. This study contributes to understanding early Christian liturgical development by showing how temporal practices embody theological convictions, illustrating the Church's growing recognition of baptism as genuine participation in Christ's transformative passage from life to death to resurrection.